diff --git a/core/java/com/android/internal/widget/RemeasuringLinearLayout.java b/core/java/com/android/internal/widget/RemeasuringLinearLayout.java
index 80d1457..7b154a5 100644
--- a/core/java/com/android/internal/widget/RemeasuringLinearLayout.java
+++ b/core/java/com/android/internal/widget/RemeasuringLinearLayout.java
@@ -18,7 +18,6 @@
 
 import android.annotation.Nullable;
 import android.content.Context;
-import android.os.Trace;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.LinearLayout;
@@ -55,7 +54,6 @@
 
     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
-        Trace.beginSection("RemeasuringLinearLayout#onMeasure");
         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
         int count = getChildCount();
         int height = 0;
@@ -88,6 +86,5 @@
         }
         mMatchParentViews.clear();
         setMeasuredDimension(getMeasuredWidth(), height);
-        Trace.endSection();
     }
 }
diff --git a/libs/WindowManager/Shell/res/values/config.xml b/libs/WindowManager/Shell/res/values/config.xml
index df5f921..c6197c8 100644
--- a/libs/WindowManager/Shell/res/values/config.xml
+++ b/libs/WindowManager/Shell/res/values/config.xml
@@ -111,4 +111,8 @@
 
     <!-- Whether to dim a split-screen task when the other is the IME target -->
     <bool name="config_dimNonImeAttachedSide">true</bool>
+
+    <!-- Components support to launch multiple instances into split-screen -->
+    <string-array name="config_componentsSupportMultiInstancesSplit">
+    </string-array>
 </resources>
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/common/split/SplitLayout.java b/libs/WindowManager/Shell/src/com/android/wm/shell/common/split/SplitLayout.java
index 839edc8..3de1045 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/common/split/SplitLayout.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/common/split/SplitLayout.java
@@ -601,7 +601,7 @@
         animator.start();
     }
 
-    /** Swich both surface position with animation. */
+    /** Switch both surface position with animation. */
     public void splitSwitching(SurfaceControl.Transaction t, SurfaceControl leash1,
             SurfaceControl leash2, Consumer<Rect> finishCallback) {
         final boolean isLandscape = isLandscape();
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/ISplitScreen.aidl b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/ISplitScreen.aidl
index eb08d0e..5533ad5 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/ISplitScreen.aidl
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/ISplitScreen.aidl
@@ -86,8 +86,8 @@
     /**
      * Starts a pair of intent and task in one transition.
      */
-    oneway void startIntentAndTask(in PendingIntent pendingIntent, in Intent fillInIntent,
-            in Bundle options1, int taskId, in Bundle options2, int sidePosition, float splitRatio,
+    oneway void startIntentAndTask(in PendingIntent pendingIntent, in Bundle options1, int taskId,
+            in Bundle options2, int sidePosition, float splitRatio,
             in RemoteTransition remoteTransition, in InstanceId instanceId) = 16;
 
     /**
@@ -108,9 +108,8 @@
      * Starts a pair of intent and task using legacy transition system.
      */
     oneway void startIntentAndTaskWithLegacyTransition(in PendingIntent pendingIntent,
-            in Intent fillInIntent, in Bundle options1, int taskId, in Bundle options2,
-            int splitPosition, float splitRatio, in RemoteAnimationAdapter adapter,
-            in InstanceId instanceId) = 12;
+            in Bundle options1, int taskId, in Bundle options2, int splitPosition, float splitRatio,
+            in RemoteAnimationAdapter adapter, in InstanceId instanceId) = 12;
 
     /**
      * Starts a pair of shortcut and task using legacy transition system.
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java
index c6a2b83..cdc8cdd 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java
@@ -18,6 +18,7 @@
 
 import static android.app.ActivityManager.START_SUCCESS;
 import static android.app.ActivityManager.START_TASK_TO_FRONT;
+import static android.app.ActivityTaskManager.INVALID_TASK_ID;
 import static android.content.Intent.FLAG_ACTIVITY_MULTIPLE_TASK;
 import static android.content.Intent.FLAG_ACTIVITY_NO_USER_ACTION;
 import static android.view.Display.DEFAULT_DISPLAY;
@@ -32,6 +33,8 @@
 import static com.android.wm.shell.sysui.ShellSharedConstants.KEY_EXTRA_SHELL_SPLIT_SCREEN;
 import static com.android.wm.shell.transition.Transitions.ENABLE_SHELL_TRANSITIONS;
 
+import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.app.ActivityManager;
 import android.app.ActivityOptions;
 import android.app.ActivityTaskManager;
@@ -60,13 +63,12 @@
 
 import androidx.annotation.BinderThread;
 import androidx.annotation.IntDef;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.logging.InstanceId;
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.launcher3.icons.IconProvider;
+import com.android.wm.shell.R;
 import com.android.wm.shell.RootTaskDisplayAreaOrganizer;
 import com.android.wm.shell.ShellTaskOrganizer;
 import com.android.wm.shell.common.DisplayController;
@@ -166,8 +168,11 @@
     private final IconProvider mIconProvider;
     private final Optional<RecentTasksController> mRecentTasksOptional;
     private final SplitScreenShellCommandHandler mSplitScreenShellCommandHandler;
+    private final String[] mMultiInstancesComponents;
 
-    private StageCoordinator mStageCoordinator;
+    @VisibleForTesting
+    StageCoordinator mStageCoordinator;
+
     // Only used for the legacy recents animation from splitscreen to allow the tasks to be animated
     // outside the bounds of the roots by being reparented into a higher level fullscreen container
     private SurfaceControl mGoingToRecentsTasksLayer;
@@ -210,6 +215,51 @@
         if (ActivityTaskManager.supportsSplitScreenMultiWindow(context)) {
             shellInit.addInitCallback(this::onInit, this);
         }
+
+        // TODO(255224696): Remove the config once having a way for client apps to opt-in
+        //                  multi-instances split.
+        mMultiInstancesComponents = mContext.getResources()
+                .getStringArray(R.array.config_componentsSupportMultiInstancesSplit);
+    }
+
+    @VisibleForTesting
+    SplitScreenController(Context context,
+            ShellInit shellInit,
+            ShellCommandHandler shellCommandHandler,
+            ShellController shellController,
+            ShellTaskOrganizer shellTaskOrganizer,
+            SyncTransactionQueue syncQueue,
+            RootTaskDisplayAreaOrganizer rootTDAOrganizer,
+            DisplayController displayController,
+            DisplayImeController displayImeController,
+            DisplayInsetsController displayInsetsController,
+            DragAndDropController dragAndDropController,
+            Transitions transitions,
+            TransactionPool transactionPool,
+            IconProvider iconProvider,
+            RecentTasksController recentTasks,
+            ShellExecutor mainExecutor,
+            StageCoordinator stageCoordinator) {
+        mShellCommandHandler = shellCommandHandler;
+        mShellController = shellController;
+        mTaskOrganizer = shellTaskOrganizer;
+        mSyncQueue = syncQueue;
+        mContext = context;
+        mRootTDAOrganizer = rootTDAOrganizer;
+        mMainExecutor = mainExecutor;
+        mDisplayController = displayController;
+        mDisplayImeController = displayImeController;
+        mDisplayInsetsController = displayInsetsController;
+        mDragAndDropController = dragAndDropController;
+        mTransitions = transitions;
+        mTransactionPool = transactionPool;
+        mIconProvider = iconProvider;
+        mRecentTasksOptional = Optional.of(recentTasks);
+        mStageCoordinator = stageCoordinator;
+        mSplitScreenShellCommandHandler = new SplitScreenShellCommandHandler(this);
+        shellInit.addInitCallback(this::onInit, this);
+        mMultiInstancesComponents = mContext.getResources()
+                .getStringArray(R.array.config_componentsSupportMultiInstancesSplit);
     }
 
     public SplitScreen asSplitScreen() {
@@ -471,72 +521,116 @@
         startIntent(intent, fillInIntent, position, options);
     }
 
+    private void startIntentAndTaskWithLegacyTransition(PendingIntent pendingIntent,
+            @Nullable Bundle options1, int taskId, @Nullable Bundle options2,
+            @SplitPosition int splitPosition, float splitRatio, RemoteAnimationAdapter adapter,
+            InstanceId instanceId) {
+        Intent fillInIntent = null;
+        if (launchSameComponentAdjacently(pendingIntent, splitPosition, taskId)
+                && supportMultiInstancesSplit(pendingIntent.getIntent().getComponent())) {
+            fillInIntent = new Intent();
+            fillInIntent.addFlags(FLAG_ACTIVITY_MULTIPLE_TASK);
+        }
+        mStageCoordinator.startIntentAndTaskWithLegacyTransition(pendingIntent, fillInIntent,
+                options1, taskId, options2, splitPosition, splitRatio, adapter, instanceId);
+    }
+
+    private void startIntentAndTask(PendingIntent pendingIntent, @Nullable Bundle options1,
+            int taskId, @Nullable Bundle options2, @SplitPosition int splitPosition,
+            float splitRatio, @Nullable RemoteTransition remoteTransition, InstanceId instanceId) {
+        Intent fillInIntent = null;
+        if (launchSameComponentAdjacently(pendingIntent, splitPosition, taskId)
+                && supportMultiInstancesSplit(pendingIntent.getIntent().getComponent())) {
+            fillInIntent = new Intent();
+            fillInIntent.addFlags(FLAG_ACTIVITY_MULTIPLE_TASK);
+        }
+        mStageCoordinator.startIntentAndTask(pendingIntent, fillInIntent, options1, taskId,
+                options2, splitPosition, splitRatio, remoteTransition, instanceId);
+    }
+
     @Override
     public void startIntent(PendingIntent intent, @Nullable Intent fillInIntent,
             @SplitPosition int position, @Nullable Bundle options) {
-        if (fillInIntent == null) {
-            fillInIntent = new Intent();
-        }
-        // Flag this as a no-user-action launch to prevent sending user leaving event to the
-        // current top activity since it's going to be put into another side of the split. This
-        // prevents the current top activity from going into pip mode due to user leaving event.
+        // Flag this as a no-user-action launch to prevent sending user leaving event to the current
+        // top activity since it's going to be put into another side of the split. This prevents the
+        // current top activity from going into pip mode due to user leaving event.
+        if (fillInIntent == null) fillInIntent = new Intent();
         fillInIntent.addFlags(FLAG_ACTIVITY_NO_USER_ACTION);
 
-        // Flag with MULTIPLE_TASK if this is launching the same activity into both sides of the
-        // split and there is no reusable background task.
-        if (shouldAddMultipleTaskFlag(intent.getIntent(), position)) {
-            final ActivityManager.RecentTaskInfo taskInfo = mRecentTasksOptional.isPresent()
-                    ? mRecentTasksOptional.get().findTaskInBackground(
-                            intent.getIntent().getComponent())
-                    : null;
-            if (taskInfo != null) {
-                startTask(taskInfo.taskId, position, options);
+        if (launchSameComponentAdjacently(intent, position, INVALID_TASK_ID)) {
+            final ComponentName launching = intent.getIntent().getComponent();
+            if (supportMultiInstancesSplit(launching)) {
+                // To prevent accumulating large number of instances in the background, reuse task
+                // in the background with priority.
+                final ActivityManager.RecentTaskInfo taskInfo = mRecentTasksOptional
+                        .map(recentTasks -> recentTasks.findTaskInBackground(launching))
+                        .orElse(null);
+                if (taskInfo != null) {
+                    startTask(taskInfo.taskId, position, options);
+                    ProtoLog.v(ShellProtoLogGroup.WM_SHELL_SPLIT_SCREEN,
+                            "Start task in background");
+                    return;
+                }
+
+                // Flag with MULTIPLE_TASK if this is launching the same activity into both sides of
+                // the split and there is no reusable background task.
+                fillInIntent.addFlags(FLAG_ACTIVITY_MULTIPLE_TASK);
+                ProtoLog.v(ShellProtoLogGroup.WM_SHELL_SPLIT_SCREEN, "Adding MULTIPLE_TASK");
+            } else if (isSplitScreenVisible()) {
+                mStageCoordinator.switchSplitPosition("startIntent");
                 return;
             }
-            fillInIntent.addFlags(FLAG_ACTIVITY_MULTIPLE_TASK);
-            ProtoLog.v(ShellProtoLogGroup.WM_SHELL_SPLIT_SCREEN, "Adding MULTIPLE_TASK");
         }
 
-        if (!ENABLE_SHELL_TRANSITIONS) {
-            mStageCoordinator.startIntentLegacy(intent, fillInIntent, position, options);
-            return;
-        }
         mStageCoordinator.startIntent(intent, fillInIntent, position, options);
     }
 
     /** Returns {@code true} if it's launching the same component on both sides of the split. */
-    @VisibleForTesting
-    boolean shouldAddMultipleTaskFlag(@Nullable Intent startIntent, @SplitPosition int position) {
-        if (startIntent == null) {
-            return false;
-        }
+    private boolean launchSameComponentAdjacently(@Nullable PendingIntent pendingIntent,
+            @SplitPosition int position, int taskId) {
+        if (pendingIntent == null || pendingIntent.getIntent() == null) return false;
 
-        final ComponentName launchingActivity = startIntent.getComponent();
-        if (launchingActivity == null) {
-            return false;
-        }
+        final ComponentName launchingActivity = pendingIntent.getIntent().getComponent();
+        if (launchingActivity == null) return false;
 
-        if (isSplitScreenVisible()) {
-            // To prevent users from constantly dropping the same app to the same side resulting in
-            // a large number of instances in the background.
-            final ActivityManager.RunningTaskInfo targetTaskInfo = getTaskInfo(position);
-            final ComponentName targetActivity = targetTaskInfo != null
-                    ? targetTaskInfo.baseIntent.getComponent() : null;
-            if (Objects.equals(launchingActivity, targetActivity)) {
-                return false;
+        if (taskId != INVALID_TASK_ID) {
+            final ActivityManager.RunningTaskInfo taskInfo =
+                    mTaskOrganizer.getRunningTaskInfo(taskId);
+            if (taskInfo != null) {
+                return Objects.equals(taskInfo.baseIntent.getComponent(), launchingActivity);
             }
-
-            // Allow users to start a new instance the same to adjacent side.
-            final ActivityManager.RunningTaskInfo pairedTaskInfo =
-                    getTaskInfo(SplitLayout.reversePosition(position));
-            final ComponentName pairedActivity = pairedTaskInfo != null
-                    ? pairedTaskInfo.baseIntent.getComponent() : null;
-            return Objects.equals(launchingActivity, pairedActivity);
+            return false;
         }
 
-        final ActivityManager.RunningTaskInfo taskInfo = getFocusingTaskInfo();
-        if (taskInfo != null && isValidToEnterSplitScreen(taskInfo)) {
-            return Objects.equals(taskInfo.baseIntent.getComponent(), launchingActivity);
+        if (!isSplitScreenVisible()) {
+            // Split screen is not yet activated, check if the current top running task is valid to
+            // split together.
+            final ActivityManager.RunningTaskInfo taskInfo = getFocusingTaskInfo();
+            if (taskInfo != null && isValidToEnterSplitScreen(taskInfo)) {
+                return Objects.equals(taskInfo.baseIntent.getComponent(), launchingActivity);
+            }
+            return false;
+        }
+
+        // Compare to the adjacent side of the split to determine if this is launching the same
+        // component adjacently.
+        final ActivityManager.RunningTaskInfo pairedTaskInfo =
+                getTaskInfo(SplitLayout.reversePosition(position));
+        final ComponentName pairedActivity = pairedTaskInfo != null
+                ? pairedTaskInfo.baseIntent.getComponent() : null;
+        return Objects.equals(launchingActivity, pairedActivity);
+    }
+
+    @VisibleForTesting
+    /** Returns {@code true} if the component supports multi-instances split. */
+    boolean supportMultiInstancesSplit(@Nullable ComponentName launching) {
+        if (launching == null) return false;
+
+        final String componentName = launching.flattenToString();
+        for (int i = 0; i < mMultiInstancesComponents.length; i++) {
+            if (mMultiInstancesComponents[i].equals(componentName)) {
+                return true;
+            }
         }
 
         return false;
@@ -839,14 +933,13 @@
 
         @Override
         public void startIntentAndTaskWithLegacyTransition(PendingIntent pendingIntent,
-                Intent fillInIntent, Bundle options1, int taskId, Bundle options2,
-                int splitPosition, float splitRatio, RemoteAnimationAdapter adapter,
-                InstanceId instanceId) {
+                Bundle options1, int taskId, Bundle options2, int splitPosition, float splitRatio,
+                RemoteAnimationAdapter adapter, InstanceId instanceId) {
             executeRemoteCallWithTaskPermission(mController,
                     "startIntentAndTaskWithLegacyTransition", (controller) ->
-                            controller.mStageCoordinator.startIntentAndTaskWithLegacyTransition(
-                                    pendingIntent, fillInIntent, options1, taskId, options2,
-                                    splitPosition, splitRatio, adapter, instanceId));
+                            controller.startIntentAndTaskWithLegacyTransition(pendingIntent,
+                                    options1, taskId, options2, splitPosition, splitRatio, adapter,
+                                    instanceId));
         }
 
         @Override
@@ -872,14 +965,13 @@
         }
 
         @Override
-        public void startIntentAndTask(PendingIntent pendingIntent, Intent fillInIntent,
-                @Nullable Bundle options1, int taskId, @Nullable Bundle options2,
-                @SplitPosition int splitPosition, float splitRatio,
-                @Nullable RemoteTransition remoteTransition, InstanceId instanceId) {
+        public void startIntentAndTask(PendingIntent pendingIntent, @Nullable Bundle options1,
+                int taskId, @Nullable Bundle options2, @SplitPosition int splitPosition,
+                float splitRatio, @Nullable RemoteTransition remoteTransition,
+                InstanceId instanceId) {
             executeRemoteCallWithTaskPermission(mController, "startIntentAndTask",
-                    (controller) -> controller.mStageCoordinator.startIntentAndTask(pendingIntent,
-                            fillInIntent, options1, taskId, options2, splitPosition, splitRatio,
-                            remoteTransition, instanceId));
+                    (controller) -> controller.startIntentAndTask(pendingIntent, options1, taskId,
+                            options2, splitPosition, splitRatio, remoteTransition, instanceId));
         }
 
         @Override
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java
index e888c6f..c2ab7ef 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java
@@ -24,7 +24,6 @@
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_HOME;
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_RECENTS;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
-import static android.content.Intent.FLAG_ACTIVITY_MULTIPLE_TASK;
 import static android.content.res.Configuration.SMALLEST_SCREEN_WIDTH_DP_UNDEFINED;
 import static android.view.Display.DEFAULT_DISPLAY;
 import static android.view.RemoteAnimationTarget.MODE_OPENING;
@@ -428,6 +427,11 @@
     /** Launches an activity into split. */
     void startIntent(PendingIntent intent, Intent fillInIntent, @SplitPosition int position,
             @Nullable Bundle options) {
+        if (!ENABLE_SHELL_TRANSITIONS) {
+            startIntentLegacy(intent, fillInIntent, position, options);
+            return;
+        }
+
         final WindowContainerTransaction wct = new WindowContainerTransaction();
         final WindowContainerTransaction evictWct = new WindowContainerTransaction();
         prepareEvictChildTasks(position, evictWct);
@@ -441,13 +445,7 @@
         prepareEnterSplitScreen(wct, null /* taskInfo */, position);
 
         mSplitTransitions.startEnterTransition(transitType, wct, null, this,
-                aborted -> {
-                    // Switch the split position if launching as MULTIPLE_TASK failed.
-                    if (aborted && (fillInIntent.getFlags() & FLAG_ACTIVITY_MULTIPLE_TASK) != 0) {
-                        setSideStagePositionAnimated(
-                                SplitLayout.reversePosition(mSideStagePosition));
-                    }
-                } /* consumedCallback */,
+                null /* consumedCallback */,
                 (finishWct, finishT) -> {
                     if (!evictWct.isEmpty()) {
                         finishWct.merge(evictWct, true);
@@ -457,7 +455,7 @@
 
     /** Launches an activity into split by legacy transition. */
     void startIntentLegacy(PendingIntent intent, Intent fillInIntent,
-            @SplitPosition int position, @androidx.annotation.Nullable Bundle options) {
+            @SplitPosition int position, @Nullable Bundle options) {
         final WindowContainerTransaction evictWct = new WindowContainerTransaction();
         prepareEvictChildTasks(position, evictWct);
 
@@ -473,12 +471,6 @@
                                 exitSplitScreen(mMainStage.getChildCount() == 0
                                         ? mSideStage : mMainStage, EXIT_REASON_UNKNOWN));
                         mSplitUnsupportedToast.show();
-                    } else {
-                        // Switch the split position if launching as MULTIPLE_TASK failed.
-                        if ((fillInIntent.getFlags() & FLAG_ACTIVITY_MULTIPLE_TASK) != 0) {
-                            setSideStagePosition(SplitLayout.reversePosition(
-                                    getSideStagePosition()), null);
-                        }
                     }
 
                     // Do nothing when the animation was cancelled.
@@ -771,9 +763,8 @@
         mSideStage.evictInvisibleChildren(wct);
     }
 
-    Bundle resolveStartStage(@StageType int stage,
-            @SplitPosition int position, @androidx.annotation.Nullable Bundle options,
-            @androidx.annotation.Nullable WindowContainerTransaction wct) {
+    Bundle resolveStartStage(@StageType int stage, @SplitPosition int position,
+            @Nullable Bundle options, @Nullable WindowContainerTransaction wct) {
         switch (stage) {
             case STAGE_TYPE_UNDEFINED: {
                 if (position != SPLIT_POSITION_UNDEFINED) {
@@ -844,9 +835,8 @@
                 : mMainStage.getTopVisibleChildTaskId();
     }
 
-    void setSideStagePositionAnimated(@SplitPosition int sideStagePosition) {
-        if (mSideStagePosition == sideStagePosition) return;
-        SurfaceControl.Transaction t = mTransactionPool.acquire();
+    void switchSplitPosition(String reason) {
+        final SurfaceControl.Transaction t = mTransactionPool.acquire();
         mTempRect1.setEmpty();
         final StageTaskListener topLeftStage =
                 mSideStagePosition == SPLIT_POSITION_TOP_OR_LEFT ? mSideStage : mMainStage;
@@ -886,6 +876,11 @@
                         va.start();
                     });
                 });
+
+        ProtoLog.v(ShellProtoLogGroup.WM_SHELL_SPLIT_SCREEN, "Switch split position: %s", reason);
+        mLogger.logSwap(getMainStagePosition(), mMainStage.getTopChildTaskUid(),
+                getSideStagePosition(), mSideStage.getTopChildTaskUid(),
+                mSplitLayout.isLandscape());
     }
 
     void setSideStagePosition(@SplitPosition int sideStagePosition,
@@ -1617,10 +1612,7 @@
 
     @Override
     public void onDoubleTappedDivider() {
-        setSideStagePositionAnimated(SplitLayout.reversePosition(mSideStagePosition));
-        mLogger.logSwap(getMainStagePosition(), mMainStage.getTopChildTaskUid(),
-                getSideStagePosition(), mSideStage.getTopChildTaskUid(),
-                mSplitLayout.isLandscape());
+        switchSplitPosition("double tap");
     }
 
     @Override
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/SplitScreenControllerTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/SplitScreenControllerTests.java
index d01f3d3..38b75f8 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/SplitScreenControllerTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/SplitScreenControllerTests.java
@@ -16,18 +16,24 @@
 
 package com.android.wm.shell.splitscreen;
 
+import static android.app.PendingIntent.FLAG_IMMUTABLE;
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.app.WindowConfiguration.WINDOWING_MODE_MULTI_WINDOW;
+import static android.content.Intent.FLAG_ACTIVITY_MULTIPLE_TASK;
+import static android.content.Intent.FLAG_ACTIVITY_NO_USER_ACTION;
 
 import static com.android.wm.shell.common.split.SplitScreenConstants.SPLIT_POSITION_BOTTOM_OR_RIGHT;
 import static com.android.wm.shell.common.split.SplitScreenConstants.SPLIT_POSITION_TOP_OR_LEFT;
 
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assume.assumeTrue;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.isNull;
+import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
@@ -35,6 +41,8 @@
 import static org.mockito.Mockito.when;
 
 import android.app.ActivityManager;
+import android.app.ActivityTaskManager;
+import android.app.PendingIntent;
 import android.content.ComponentName;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
@@ -65,11 +73,11 @@
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import java.util.Optional;
-
 /**
  * Tests for {@link SplitScreenController}
  */
@@ -91,18 +99,21 @@
     @Mock Transitions mTransitions;
     @Mock TransactionPool mTransactionPool;
     @Mock IconProvider mIconProvider;
-    @Mock Optional<RecentTasksController> mRecentTasks;
+    @Mock StageCoordinator mStageCoordinator;
+    @Mock RecentTasksController mRecentTasks;
+    @Captor ArgumentCaptor<Intent> mIntentCaptor;
 
     private SplitScreenController mSplitScreenController;
 
     @Before
     public void setup() {
+        assumeTrue(ActivityTaskManager.supportsSplitScreenMultiWindow(mContext));
         MockitoAnnotations.initMocks(this);
         mSplitScreenController = spy(new SplitScreenController(mContext, mShellInit,
                 mShellCommandHandler, mShellController, mTaskOrganizer, mSyncQueue,
                 mRootTDAOrganizer, mDisplayController, mDisplayImeController,
                 mDisplayInsetsController, mDragAndDropController, mTransitions, mTransactionPool,
-                mIconProvider, mRecentTasks, mMainExecutor));
+                mIconProvider, mRecentTasks, mMainExecutor, mStageCoordinator));
     }
 
     @Test
@@ -148,58 +159,100 @@
     }
 
     @Test
-    public void testShouldAddMultipleTaskFlag_notInSplitScreen() {
-        doReturn(false).when(mSplitScreenController).isSplitScreenVisible();
-        doReturn(true).when(mSplitScreenController).isValidToEnterSplitScreen(any());
-
-        // Verify launching the same activity returns true.
+    public void testStartIntent_appendsNoUserActionFlag() {
         Intent startIntent = createStartIntent("startActivity");
-        ActivityManager.RunningTaskInfo focusTaskInfo =
-                createTaskInfo(WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, startIntent);
-        doReturn(focusTaskInfo).when(mSplitScreenController).getFocusingTaskInfo();
-        assertTrue(mSplitScreenController.shouldAddMultipleTaskFlag(
-                startIntent, SPLIT_POSITION_TOP_OR_LEFT));
+        PendingIntent pendingIntent =
+                PendingIntent.getActivity(mContext, 0, startIntent, FLAG_IMMUTABLE);
 
-        // Verify launching different activity returns false.
-        Intent diffIntent = createStartIntent("diffActivity");
-        focusTaskInfo =
-                createTaskInfo(WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, diffIntent);
-        doReturn(focusTaskInfo).when(mSplitScreenController).getFocusingTaskInfo();
-        assertFalse(mSplitScreenController.shouldAddMultipleTaskFlag(
-                startIntent, SPLIT_POSITION_TOP_OR_LEFT));
+        mSplitScreenController.startIntent(pendingIntent, null, SPLIT_POSITION_TOP_OR_LEFT, null);
+
+        verify(mStageCoordinator).startIntent(eq(pendingIntent), mIntentCaptor.capture(),
+                eq(SPLIT_POSITION_TOP_OR_LEFT), isNull());
+        assertEquals(FLAG_ACTIVITY_NO_USER_ACTION,
+                mIntentCaptor.getValue().getFlags() & FLAG_ACTIVITY_NO_USER_ACTION);
     }
 
     @Test
-    public void testShouldAddMultipleTaskFlag_inSplitScreen() {
-        doReturn(true).when(mSplitScreenController).isSplitScreenVisible();
+    public void startIntent_multiInstancesSupported_appendsMultipleTaskFag() {
+        doReturn(true).when(mSplitScreenController).supportMultiInstancesSplit(any());
         Intent startIntent = createStartIntent("startActivity");
+        PendingIntent pendingIntent =
+                PendingIntent.getActivity(mContext, 0, startIntent, FLAG_IMMUTABLE);
+        // Put the same component into focus task
+        ActivityManager.RunningTaskInfo focusTaskInfo =
+                createTaskInfo(WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, startIntent);
+        doReturn(focusTaskInfo).when(mStageCoordinator).getFocusingTaskInfo();
+        doReturn(true).when(mStageCoordinator).isValidToEnterSplitScreen(any());
+
+        mSplitScreenController.startIntent(pendingIntent, null, SPLIT_POSITION_TOP_OR_LEFT, null);
+
+        verify(mStageCoordinator).startIntent(eq(pendingIntent), mIntentCaptor.capture(),
+                eq(SPLIT_POSITION_TOP_OR_LEFT), isNull());
+        assertEquals(FLAG_ACTIVITY_MULTIPLE_TASK,
+                mIntentCaptor.getValue().getFlags() & FLAG_ACTIVITY_MULTIPLE_TASK);
+    }
+
+    @Test
+    public void startIntent_multiInstancesSupported_startTaskInBackgroundBeforeSplitActivated() {
+        doReturn(true).when(mSplitScreenController).supportMultiInstancesSplit(any());
+        doNothing().when(mSplitScreenController).startTask(anyInt(), anyInt(), any());
+        Intent startIntent = createStartIntent("startActivity");
+        PendingIntent pendingIntent =
+                PendingIntent.getActivity(mContext, 0, startIntent, FLAG_IMMUTABLE);
+        // Put the same component into focus task
+        ActivityManager.RunningTaskInfo focusTaskInfo =
+                createTaskInfo(WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, startIntent);
+        doReturn(focusTaskInfo).when(mStageCoordinator).getFocusingTaskInfo();
+        doReturn(true).when(mStageCoordinator).isValidToEnterSplitScreen(any());
+        // Put the same component into a task in the background
+        ActivityManager.RecentTaskInfo sameTaskInfo = new ActivityManager.RecentTaskInfo();
+        doReturn(sameTaskInfo).when(mRecentTasks).findTaskInBackground(any());
+
+        mSplitScreenController.startIntent(pendingIntent, null, SPLIT_POSITION_TOP_OR_LEFT, null);
+
+        verify(mSplitScreenController).startTask(anyInt(), eq(SPLIT_POSITION_TOP_OR_LEFT),
+                isNull());
+    }
+
+    @Test
+    public void startIntent_multiInstancesSupported_startTaskInBackgroundAfterSplitActivated() {
+        doReturn(true).when(mSplitScreenController).supportMultiInstancesSplit(any());
+        doNothing().when(mSplitScreenController).startTask(anyInt(), anyInt(), any());
+        Intent startIntent = createStartIntent("startActivity");
+        PendingIntent pendingIntent =
+                PendingIntent.getActivity(mContext, 0, startIntent, FLAG_IMMUTABLE);
+        // Put the same component into another side of the split
+        doReturn(true).when(mSplitScreenController).isSplitScreenVisible();
         ActivityManager.RunningTaskInfo sameTaskInfo =
                 createTaskInfo(WINDOWING_MODE_MULTI_WINDOW, ACTIVITY_TYPE_STANDARD, startIntent);
-        Intent diffIntent = createStartIntent("diffActivity");
-        ActivityManager.RunningTaskInfo differentTaskInfo =
-                createTaskInfo(WINDOWING_MODE_MULTI_WINDOW, ACTIVITY_TYPE_STANDARD, diffIntent);
+        doReturn(sameTaskInfo).when(mSplitScreenController).getTaskInfo(
+                SPLIT_POSITION_BOTTOM_OR_RIGHT);
+        // Put the same component into a task in the background
+        doReturn(new ActivityManager.RecentTaskInfo()).when(mRecentTasks)
+                .findTaskInBackground(any());
 
-        // Verify launching the same activity return false.
-        doReturn(sameTaskInfo).when(mSplitScreenController)
-                .getTaskInfo(SPLIT_POSITION_TOP_OR_LEFT);
-        assertFalse(mSplitScreenController.shouldAddMultipleTaskFlag(
-                startIntent, SPLIT_POSITION_TOP_OR_LEFT));
+        mSplitScreenController.startIntent(pendingIntent, null, SPLIT_POSITION_TOP_OR_LEFT, null);
 
-        // Verify launching the same activity as adjacent returns true.
-        doReturn(differentTaskInfo).when(mSplitScreenController)
-                .getTaskInfo(SPLIT_POSITION_TOP_OR_LEFT);
-        doReturn(sameTaskInfo).when(mSplitScreenController)
-                .getTaskInfo(SPLIT_POSITION_BOTTOM_OR_RIGHT);
-        assertTrue(mSplitScreenController.shouldAddMultipleTaskFlag(
-                startIntent, SPLIT_POSITION_TOP_OR_LEFT));
+        verify(mSplitScreenController).startTask(anyInt(), eq(SPLIT_POSITION_TOP_OR_LEFT),
+                isNull());
+    }
 
-        // Verify launching different activity from adjacent returns false.
-        doReturn(differentTaskInfo).when(mSplitScreenController)
-                .getTaskInfo(SPLIT_POSITION_TOP_OR_LEFT);
-        doReturn(differentTaskInfo).when(mSplitScreenController)
-                .getTaskInfo(SPLIT_POSITION_BOTTOM_OR_RIGHT);
-        assertFalse(mSplitScreenController.shouldAddMultipleTaskFlag(
-                startIntent, SPLIT_POSITION_TOP_OR_LEFT));
+    @Test
+    public void startIntent_multiInstancesNotSupported_switchesPositionAfterSplitActivated() {
+        doReturn(false).when(mSplitScreenController).supportMultiInstancesSplit(any());
+        Intent startIntent = createStartIntent("startActivity");
+        PendingIntent pendingIntent =
+                PendingIntent.getActivity(mContext, 0, startIntent, FLAG_IMMUTABLE);
+        // Put the same component into another side of the split
+        doReturn(true).when(mSplitScreenController).isSplitScreenVisible();
+        ActivityManager.RunningTaskInfo sameTaskInfo =
+                createTaskInfo(WINDOWING_MODE_MULTI_WINDOW, ACTIVITY_TYPE_STANDARD, startIntent);
+        doReturn(sameTaskInfo).when(mSplitScreenController).getTaskInfo(
+                SPLIT_POSITION_BOTTOM_OR_RIGHT);
+
+        mSplitScreenController.startIntent(pendingIntent, null, SPLIT_POSITION_TOP_OR_LEFT, null);
+
+        verify(mStageCoordinator).switchSplitPosition(anyString());
     }
 
     private Intent createStartIntent(String activityName) {
diff --git a/packages/SettingsLib/src/com/android/settingslib/graph/ThemedBatteryDrawable.kt b/packages/SettingsLib/src/com/android/settingslib/graph/ThemedBatteryDrawable.kt
index 5fa04f9..faea5b2 100644
--- a/packages/SettingsLib/src/com/android/settingslib/graph/ThemedBatteryDrawable.kt
+++ b/packages/SettingsLib/src/com/android/settingslib/graph/ThemedBatteryDrawable.kt
@@ -412,14 +412,13 @@
     }
 
     companion object {
-        private const val TAG = "ThemedBatteryDrawable"
-        private const val WIDTH = 12f
-        private const val HEIGHT = 20f
+        const val WIDTH = 12f
+        const val HEIGHT = 20f
         private const val CRITICAL_LEVEL = 15
         // On a 12x20 grid, how wide to make the fill protection stroke.
         // Scales when our size changes
         private const val PROTECTION_STROKE_WIDTH = 3f
         // Arbitrarily chosen for visibility at small sizes
-        private const val PROTECTION_MIN_STROKE_WIDTH = 6f
+        const val PROTECTION_MIN_STROKE_WIDTH = 6f
     }
 }
diff --git a/packages/SystemUI/res/values/config.xml b/packages/SystemUI/res/values/config.xml
index ce9829b..55d6379 100644
--- a/packages/SystemUI/res/values/config.xml
+++ b/packages/SystemUI/res/values/config.xml
@@ -485,6 +485,12 @@
     <!-- Whether to show a severe low battery dialog. -->
     <bool name="config_severe_battery_dialog">false</bool>
 
+    <!-- A path representing a shield. Will sometimes be displayed with the battery icon when
+         needed. This path is a 10px wide and 13px tall. -->
+    <string name="config_batterymeterShieldPath" translatable="false">
+        M5 0L0 1.88V6.19C0 9.35 2.13 12.29 5 13.01C7.87 12.29 10 9.35 10 6.19V1.88L5 0Z
+    </string>
+
     <!-- A path similar to frameworks/base/core/res/res/values/config.xml
       config_mainBuiltInDisplayCutout that describes a path larger than the exact path of a display
       cutout. If present as well as config_enableDisplayCutoutProtection is set to true, then
diff --git a/packages/SystemUI/res/values/dimens.xml b/packages/SystemUI/res/values/dimens.xml
index 691bf89..c78d36d 100644
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -105,6 +105,12 @@
     so the width of the icon should be 13.0dp * (12.0 / 20.0) -->
     <dimen name="status_bar_battery_icon_width">7.8dp</dimen>
 
+    <!-- The battery icon is 13dp tall, but the other system icons are 15dp tall (see
+         @*android:dimen/status_bar_system_icon_size) with some top and bottom padding embedded in
+         the drawables themselves. So, the battery icon may need an extra 1dp of spacing so that its
+         bottom still aligns with the bottom of all the other system icons. See b/258672854. -->
+    <dimen name="status_bar_battery_extra_vertical_spacing">1dp</dimen>
+
     <!-- The font size for the clock in the status bar. -->
     <dimen name="status_bar_clock_size">14sp</dimen>
 
diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index eead934..4146e20 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -316,7 +316,7 @@
     <!-- Content description of the QR Code scanner for accessibility (not shown on the screen). [CHAR LIMIT=NONE] -->
     <string name="accessibility_qr_code_scanner_button">QR Code Scanner</string>
     <!-- Content description of the unlock button for accessibility (not shown on the screen). [CHAR LIMIT=NONE] -->
-    <string name="accessibility_unlock_button">Unlock</string>
+    <string name="accessibility_unlock_button">Unlocked</string>
     <!-- Content description of the lock icon for accessibility (not shown on the screen). [CHAR LIMIT=NONE] -->
     <string name="accessibility_lock_icon">Device locked</string>
     <!-- Content description hint of the unlock button when fingerprint is on (not shown on the screen). [CHAR LIMIT=NONE] -->
@@ -439,11 +439,17 @@
     <string name="accessibility_battery_level">Battery <xliff:g id="number">%d</xliff:g> percent.</string>
 
     <!-- Content description of the battery level icon for accessibility, including the estimated time remaining before the phone runs out of battery (not shown on the screen). [CHAR LIMIT=NONE] -->
-    <string name="accessibility_battery_level_with_estimate">Battery <xliff:g id="percentage" example="95%">%1$s</xliff:g> percent, about <xliff:g id="time" example="Until 3:15pm">%2$s</xliff:g> left based on your usage</string>
+    <string name="accessibility_battery_level_with_estimate">Battery <xliff:g id="percentage" example="95%">%1$d</xliff:g> percent, about <xliff:g id="time" example="Until 3:15pm">%2$s</xliff:g> left based on your usage</string>
 
     <!-- Content description of the battery level icon for accessibility while the device is charging (not shown on the screen). [CHAR LIMIT=NONE] -->
     <string name="accessibility_battery_level_charging">Battery charging, <xliff:g id="battery_percentage">%d</xliff:g> percent.</string>
 
+    <!-- Content description of the battery level icon for accessibility, with information that the device charging is paused in order to protect the lifetime of the battery (not shown on screen). [CHAR LIMIT=NONE] -->
+    <string name="accessibility_battery_level_charging_paused">Battery <xliff:g id="percentage" example="90%">%d</xliff:g> percent. Charging paused for battery protection.</string>
+
+    <!-- Content description of the battery level icon for accessibility, including the estimated time remaining before the phone runs out of battery *and* information that the device charging is paused in order to protect the lifetime of the battery (not shown on screen). [CHAR LIMIT=NONE] -->
+    <string name="accessibility_battery_level_charging_paused_with_estimate">Battery <xliff:g id="percentage" example="90%">%1$d</xliff:g> percent, about <xliff:g id="time" example="Until 3:15pm">%2$s</xliff:g> left based on your usage. Charging paused for battery protection.</string>
+
     <!-- Content description of overflow icon container of the notifications for accessibility (not shown on the screen)[CHAR LIMIT=NONE] -->
     <string name="accessibility_overflow_action">See all notifications</string>
 
diff --git a/packages/SystemUI/res/xml/qqs_header.xml b/packages/SystemUI/res/xml/qqs_header.xml
index af4be1a..e07a6c1 100644
--- a/packages/SystemUI/res/xml/qqs_header.xml
+++ b/packages/SystemUI/res/xml/qqs_header.xml
@@ -25,7 +25,7 @@
         android:id="@+id/clock">
         <Layout
             android:layout_width="wrap_content"
-            android:layout_height="0dp"
+            android:layout_height="@dimen/large_screen_shade_header_min_height"
             app:layout_constraintStart_toStartOf="@id/begin_guide"
             app:layout_constraintTop_toTopOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"
@@ -42,7 +42,7 @@
     <Constraint
         android:id="@+id/date">
         <Layout
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="@dimen/new_qs_header_non_clickable_element_height"
             android:layout_marginStart="8dp"
             app:layout_constrainedWidth="true"
@@ -57,7 +57,7 @@
     <Constraint
         android:id="@+id/statusIcons">
         <Layout
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="@dimen/new_qs_header_non_clickable_element_height"
             app:layout_constraintHeight_min="@dimen/new_qs_header_non_clickable_element_height"
             app:layout_constraintStart_toEndOf="@id/date"
@@ -65,6 +65,7 @@
             app:layout_constraintTop_toTopOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintHorizontal_bias="1"
+            app:layout_constraintHorizontal_chainStyle="packed"
             />
     </Constraint>
 
@@ -80,12 +81,16 @@
             app:layout_constraintTop_toTopOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintHorizontal_bias="1"
+            app:layout_constraintHorizontal_chainStyle="packed"
             />
     </Constraint>
 
     <Constraint
         android:id="@+id/carrier_group">
         <Layout
+            app:layout_constraintWidth_min="48dp"
+            android:layout_width="wrap_content"
+            android:layout_height="@dimen/large_screen_shade_header_min_height"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintTop_toTopOf="parent"
             />
diff --git a/packages/SystemUI/res/xml/qs_header_new.xml b/packages/SystemUI/res/xml/qs_header_new.xml
index d8a4e77..982c422 100644
--- a/packages/SystemUI/res/xml/qs_header_new.xml
+++ b/packages/SystemUI/res/xml/qs_header_new.xml
@@ -43,6 +43,7 @@
             app:layout_constraintBottom_toBottomOf="@id/carrier_group"
             app:layout_constraintEnd_toStartOf="@id/carrier_group"
             app:layout_constraintHorizontal_bias="0"
+            app:layout_constraintHorizontal_chainStyle="spread_inside"
         />
         <Transform
             android:scaleX="2.57"
@@ -53,7 +54,7 @@
     <Constraint
         android:id="@+id/date">
         <Layout
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="@dimen/new_qs_header_non_clickable_element_height"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintEnd_toStartOf="@id/space"
@@ -67,16 +68,15 @@
     <Constraint
         android:id="@+id/carrier_group">
         <Layout
-            app:layout_constraintHeight_min="@dimen/large_screen_shade_header_min_height"
-            android:minHeight="@dimen/large_screen_shade_header_min_height"
             app:layout_constraintWidth_min="48dp"
-            android:layout_width="0dp"
-            android:layout_height="0dp"
+            android:layout_width="wrap_content"
+            android:layout_height="@dimen/large_screen_shade_header_min_height"
             app:layout_constraintStart_toEndOf="@id/clock"
             app:layout_constraintTop_toBottomOf="@id/privacy_container"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintHorizontal_bias="1"
             app:layout_constraintBottom_toTopOf="@id/batteryRemainingIcon"
+            app:layout_constraintHorizontal_chainStyle="spread_inside"
             />
         <PropertySet
             android:alpha="1"
@@ -86,7 +86,7 @@
     <Constraint
         android:id="@+id/statusIcons">
         <Layout
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="@dimen/new_qs_header_non_clickable_element_height"
             app:layout_constrainedWidth="true"
             app:layout_constraintStart_toEndOf="@id/space"
@@ -108,6 +108,7 @@
             app:layout_constraintTop_toTopOf="@id/date"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintHorizontal_bias="1"
+            app:layout_constraintHorizontal_chainStyle="spread_inside"
             />
     </Constraint>
 
diff --git a/packages/SystemUI/src/com/android/systemui/battery/AccessorizedBatteryDrawable.kt b/packages/SystemUI/src/com/android/systemui/battery/AccessorizedBatteryDrawable.kt
new file mode 100644
index 0000000..b52ddc1
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/battery/AccessorizedBatteryDrawable.kt
@@ -0,0 +1,207 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+package com.android.systemui.battery
+
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.ColorFilter
+import android.graphics.Matrix
+import android.graphics.Paint
+import android.graphics.Path
+import android.graphics.PixelFormat
+import android.graphics.PorterDuff
+import android.graphics.PorterDuffXfermode
+import android.graphics.Rect
+import android.graphics.drawable.DrawableWrapper
+import android.util.PathParser
+import com.android.settingslib.graph.ThemedBatteryDrawable
+import com.android.systemui.R
+import com.android.systemui.battery.BatterySpecs.BATTERY_HEIGHT
+import com.android.systemui.battery.BatterySpecs.BATTERY_HEIGHT_WITH_SHIELD
+import com.android.systemui.battery.BatterySpecs.BATTERY_WIDTH
+import com.android.systemui.battery.BatterySpecs.BATTERY_WIDTH_WITH_SHIELD
+import com.android.systemui.battery.BatterySpecs.SHIELD_LEFT_OFFSET
+import com.android.systemui.battery.BatterySpecs.SHIELD_STROKE
+import com.android.systemui.battery.BatterySpecs.SHIELD_TOP_OFFSET
+
+/**
+ * A battery drawable that accessorizes [ThemedBatteryDrawable] with additional information if
+ * necessary.
+ *
+ * For now, it adds a shield in the bottom-right corner when [displayShield] is true.
+ */
+class AccessorizedBatteryDrawable(
+    private val context: Context,
+    frameColor: Int,
+) : DrawableWrapper(ThemedBatteryDrawable(context, frameColor)) {
+    private val mainBatteryDrawable: ThemedBatteryDrawable
+        get() = drawable as ThemedBatteryDrawable
+
+    private val shieldPath = Path()
+    private val scaledShield = Path()
+    private val scaleMatrix = Matrix()
+
+    private var shieldLeftOffsetScaled = SHIELD_LEFT_OFFSET
+    private var shieldTopOffsetScaled = SHIELD_TOP_OFFSET
+
+    private var density = context.resources.displayMetrics.density
+
+    private val dualTone =
+        context.resources.getBoolean(com.android.internal.R.bool.config_batterymeterDualTone)
+
+    private val shieldTransparentOutlinePaint =
+        Paint(Paint.ANTI_ALIAS_FLAG).also { p ->
+            p.color = Color.TRANSPARENT
+            p.strokeWidth = ThemedBatteryDrawable.PROTECTION_MIN_STROKE_WIDTH
+            p.xfermode = PorterDuffXfermode(PorterDuff.Mode.SRC_IN)
+            p.style = Paint.Style.FILL_AND_STROKE
+        }
+
+    private val shieldPaint =
+        Paint(Paint.ANTI_ALIAS_FLAG).also { p ->
+            p.color = Color.MAGENTA
+            p.style = Paint.Style.FILL
+            p.isDither = true
+        }
+
+    init {
+        loadPaths()
+    }
+
+    override fun onBoundsChange(bounds: Rect) {
+        super.onBoundsChange(bounds)
+        updateSizes()
+    }
+
+    var displayShield: Boolean = false
+
+    private fun updateSizes() {
+        val b = bounds
+        if (b.isEmpty) {
+            return
+        }
+
+        val mainWidth = BatterySpecs.getMainBatteryWidth(b.width().toFloat(), displayShield)
+        val mainHeight = BatterySpecs.getMainBatteryHeight(b.height().toFloat(), displayShield)
+
+        drawable?.setBounds(
+            b.left,
+            b.top,
+            /* right= */ b.left + mainWidth.toInt(),
+            /* bottom= */ b.top + mainHeight.toInt()
+        )
+
+        if (displayShield) {
+            val sx = b.right / BATTERY_WIDTH_WITH_SHIELD
+            val sy = b.bottom / BATTERY_HEIGHT_WITH_SHIELD
+            scaleMatrix.setScale(sx, sy)
+            shieldPath.transform(scaleMatrix, scaledShield)
+
+            shieldLeftOffsetScaled = sx * SHIELD_LEFT_OFFSET
+            shieldTopOffsetScaled = sy * SHIELD_TOP_OFFSET
+
+            val scaledStrokeWidth =
+                (sx * SHIELD_STROKE).coerceAtLeast(
+                    ThemedBatteryDrawable.PROTECTION_MIN_STROKE_WIDTH
+                )
+            shieldTransparentOutlinePaint.strokeWidth = scaledStrokeWidth
+        }
+    }
+
+    override fun getIntrinsicHeight(): Int {
+        val height =
+            if (displayShield) {
+                BATTERY_HEIGHT_WITH_SHIELD
+            } else {
+                BATTERY_HEIGHT
+            }
+        return (height * density).toInt()
+    }
+
+    override fun getIntrinsicWidth(): Int {
+        val width =
+            if (displayShield) {
+                BATTERY_WIDTH_WITH_SHIELD
+            } else {
+                BATTERY_WIDTH
+            }
+        return (width * density).toInt()
+    }
+
+    override fun draw(c: Canvas) {
+        c.saveLayer(null, null)
+        // Draw the main battery icon
+        super.draw(c)
+
+        if (displayShield) {
+            c.translate(shieldLeftOffsetScaled, shieldTopOffsetScaled)
+            // We need a transparent outline around the shield, so first draw the transparent-ness
+            // then draw the shield
+            c.drawPath(scaledShield, shieldTransparentOutlinePaint)
+            c.drawPath(scaledShield, shieldPaint)
+        }
+        c.restore()
+    }
+
+    override fun getOpacity(): Int {
+        return PixelFormat.OPAQUE
+    }
+
+    override fun setAlpha(p0: Int) {
+        // Unused internally -- see [ThemedBatteryDrawable.setAlpha].
+    }
+
+    override fun setColorFilter(colorfilter: ColorFilter?) {
+        super.setColorFilter(colorFilter)
+        shieldPaint.colorFilter = colorFilter
+    }
+
+    /** Sets whether the battery is currently charging. */
+    fun setCharging(charging: Boolean) {
+        mainBatteryDrawable.charging = charging
+    }
+
+    /** Sets the current level (out of 100) of the battery. */
+    fun setBatteryLevel(level: Int) {
+        mainBatteryDrawable.setBatteryLevel(level)
+    }
+
+    /** Sets whether power save is enabled. */
+    fun setPowerSaveEnabled(powerSaveEnabled: Boolean) {
+        mainBatteryDrawable.powerSaveEnabled = powerSaveEnabled
+    }
+
+    /** Returns whether power save is currently enabled. */
+    fun getPowerSaveEnabled(): Boolean {
+        return mainBatteryDrawable.powerSaveEnabled
+    }
+
+    /** Sets the colors to use for the icon. */
+    fun setColors(fgColor: Int, bgColor: Int, singleToneColor: Int) {
+        shieldPaint.color = if (dualTone) fgColor else singleToneColor
+        mainBatteryDrawable.setColors(fgColor, bgColor, singleToneColor)
+    }
+
+    /** Notifies this drawable that the density might have changed. */
+    fun notifyDensityChanged() {
+        density = context.resources.displayMetrics.density
+    }
+
+    private fun loadPaths() {
+        val shieldPathString = context.resources.getString(R.string.config_batterymeterShieldPath)
+        shieldPath.set(PathParser.createPathFromPathData(shieldPathString))
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterView.java b/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterView.java
index 6a10d4a..03d999f 100644
--- a/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterView.java
+++ b/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterView.java
@@ -45,7 +45,6 @@
 import androidx.annotation.StyleRes;
 import androidx.annotation.VisibleForTesting;
 
-import com.android.settingslib.graph.ThemedBatteryDrawable;
 import com.android.systemui.DualToneHandler;
 import com.android.systemui.R;
 import com.android.systemui.animation.Interpolators;
@@ -68,7 +67,7 @@
     public static final int MODE_OFF = 2;
     public static final int MODE_ESTIMATE = 3;
 
-    private final ThemedBatteryDrawable mDrawable;
+    private final AccessorizedBatteryDrawable mDrawable;
     private final ImageView mBatteryIconView;
     private TextView mBatteryPercentView;
 
@@ -77,7 +76,10 @@
     private int mLevel;
     private int mShowPercentMode = MODE_DEFAULT;
     private boolean mShowPercentAvailable;
+    private String mEstimateText = null;
     private boolean mCharging;
+    private boolean mIsOverheated;
+    private boolean mDisplayShieldEnabled;
     // Error state where we know nothing about the current battery state
     private boolean mBatteryStateUnknown;
     // Lazily-loaded since this is expected to be a rare-if-ever state
@@ -106,7 +108,7 @@
         final int frameColor = atts.getColor(R.styleable.BatteryMeterView_frameColor,
                 context.getColor(R.color.meter_background_color));
         mPercentageStyleId = atts.getResourceId(R.styleable.BatteryMeterView_textAppearance, 0);
-        mDrawable = new ThemedBatteryDrawable(context, frameColor);
+        mDrawable = new AccessorizedBatteryDrawable(context, frameColor);
         atts.recycle();
 
         mShowPercentAvailable = context.getResources().getBoolean(
@@ -170,12 +172,14 @@
         if (mode == mShowPercentMode) return;
         mShowPercentMode = mode;
         updateShowPercent();
+        updatePercentText();
     }
 
     @Override
     protected void onConfigurationChanged(Configuration newConfig) {
         super.onConfigurationChanged(newConfig);
         updatePercentView();
+        mDrawable.notifyDensityChanged();
     }
 
     public void setColorsFromContext(Context context) {
@@ -203,6 +207,17 @@
         mDrawable.setPowerSaveEnabled(isPowerSave);
     }
 
+    void onIsOverheatedChanged(boolean isOverheated) {
+        boolean valueChanged = mIsOverheated != isOverheated;
+        mIsOverheated = isOverheated;
+        if (valueChanged) {
+            updateContentDescription();
+            // The battery drawable is a different size depending on whether it's currently
+            // overheated or not, so we need to re-scale the view when overheated changes.
+            scaleBatteryMeterViews();
+        }
+    }
+
     private TextView loadPercentView() {
         return (TextView) LayoutInflater.from(getContext())
                 .inflate(R.layout.battery_percentage_view, null);
@@ -227,13 +242,17 @@
         mBatteryEstimateFetcher = fetcher;
     }
 
+    void setDisplayShieldEnabled(boolean displayShieldEnabled) {
+        mDisplayShieldEnabled = displayShieldEnabled;
+    }
+
     void updatePercentText() {
         if (mBatteryStateUnknown) {
-            setContentDescription(getContext().getString(R.string.accessibility_battery_unknown));
             return;
         }
 
         if (mBatteryEstimateFetcher == null) {
+            setPercentTextAtCurrentLevel();
             return;
         }
 
@@ -245,10 +264,9 @@
                         return;
                     }
                     if (estimate != null && mShowPercentMode == MODE_ESTIMATE) {
+                        mEstimateText = estimate;
                         mBatteryPercentView.setText(estimate);
-                        setContentDescription(getContext().getString(
-                                R.string.accessibility_battery_level_with_estimate,
-                                mLevel, estimate));
+                        updateContentDescription();
                     } else {
                         setPercentTextAtCurrentLevel();
                     }
@@ -257,28 +275,49 @@
                 setPercentTextAtCurrentLevel();
             }
         } else {
-            setContentDescription(
-                    getContext().getString(mCharging ? R.string.accessibility_battery_level_charging
-                            : R.string.accessibility_battery_level, mLevel));
+            updateContentDescription();
         }
     }
 
     private void setPercentTextAtCurrentLevel() {
-        if (mBatteryPercentView == null) {
-            return;
+        if (mBatteryPercentView != null) {
+            mEstimateText = null;
+            String percentText = NumberFormat.getPercentInstance().format(mLevel / 100f);
+            // Setting text actually triggers a layout pass (because the text view is set to
+            // wrap_content width and TextView always relayouts for this). Avoid needless
+            // relayout if the text didn't actually change.
+            if (!TextUtils.equals(mBatteryPercentView.getText(), percentText)) {
+                mBatteryPercentView.setText(percentText);
+            }
         }
 
-        String percentText = NumberFormat.getPercentInstance().format(mLevel / 100f);
-        // Setting text actually triggers a layout pass (because the text view is set to
-        // wrap_content width and TextView always relayouts for this). Avoid needless
-        // relayout if the text didn't actually change.
-        if (!TextUtils.equals(mBatteryPercentView.getText(), percentText)) {
-            mBatteryPercentView.setText(percentText);
+        updateContentDescription();
+    }
+
+    private void updateContentDescription() {
+        Context context = getContext();
+
+        String contentDescription;
+        if (mBatteryStateUnknown) {
+            contentDescription = context.getString(R.string.accessibility_battery_unknown);
+        } else if (mShowPercentMode == MODE_ESTIMATE && !TextUtils.isEmpty(mEstimateText)) {
+            contentDescription = context.getString(
+                    mIsOverheated
+                            ? R.string.accessibility_battery_level_charging_paused_with_estimate
+                            : R.string.accessibility_battery_level_with_estimate,
+                    mLevel,
+                    mEstimateText);
+        } else if (mIsOverheated) {
+            contentDescription =
+                    context.getString(R.string.accessibility_battery_level_charging_paused, mLevel);
+        } else if (mCharging) {
+            contentDescription =
+                    context.getString(R.string.accessibility_battery_level_charging, mLevel);
+        } else {
+            contentDescription = context.getString(R.string.accessibility_battery_level, mLevel);
         }
 
-        setContentDescription(
-                getContext().getString(mCharging ? R.string.accessibility_battery_level_charging
-                        : R.string.accessibility_battery_level, mLevel));
+        setContentDescription(contentDescription);
     }
 
     void updateShowPercent() {
@@ -329,6 +368,7 @@
         }
 
         mBatteryStateUnknown = isUnknown;
+        updateContentDescription();
 
         if (mBatteryStateUnknown) {
             mBatteryIconView.setImageDrawable(getUnknownStateDrawable());
@@ -349,15 +389,43 @@
         res.getValue(R.dimen.status_bar_icon_scale_factor, typedValue, true);
         float iconScaleFactor = typedValue.getFloat();
 
-        int batteryHeight = res.getDimensionPixelSize(R.dimen.status_bar_battery_icon_height);
-        int batteryWidth = res.getDimensionPixelSize(R.dimen.status_bar_battery_icon_width);
+        float mainBatteryHeight =
+                res.getDimensionPixelSize(R.dimen.status_bar_battery_icon_height) * iconScaleFactor;
+        float mainBatteryWidth =
+                res.getDimensionPixelSize(R.dimen.status_bar_battery_icon_width) * iconScaleFactor;
+
+        // If the battery is marked as overheated, we should display a shield indicating that the
+        // battery is being "defended".
+        boolean displayShield = mDisplayShieldEnabled && mIsOverheated;
+        float fullBatteryIconHeight =
+                BatterySpecs.getFullBatteryHeight(mainBatteryHeight, displayShield);
+        float fullBatteryIconWidth =
+                BatterySpecs.getFullBatteryWidth(mainBatteryWidth, displayShield);
+
+        int marginTop;
+        if (displayShield) {
+            // If the shield is displayed, we need some extra marginTop so that the bottom of the
+            // main icon is still aligned with the bottom of all the other system icons.
+            int shieldHeightAddition = Math.round(fullBatteryIconHeight - mainBatteryHeight);
+            // However, the other system icons have some embedded bottom padding that the battery
+            // doesn't have, so we shouldn't move the battery icon down by the full amount.
+            // See b/258672854.
+            marginTop = shieldHeightAddition
+                    - res.getDimensionPixelSize(R.dimen.status_bar_battery_extra_vertical_spacing);
+        } else {
+            marginTop = 0;
+        }
+
         int marginBottom = res.getDimensionPixelSize(R.dimen.battery_margin_bottom);
 
         LinearLayout.LayoutParams scaledLayoutParams = new LinearLayout.LayoutParams(
-                (int) (batteryWidth * iconScaleFactor), (int) (batteryHeight * iconScaleFactor));
-        scaledLayoutParams.setMargins(0, 0, 0, marginBottom);
+                Math.round(fullBatteryIconWidth),
+                Math.round(fullBatteryIconHeight));
+        scaledLayoutParams.setMargins(0, marginTop, 0, marginBottom);
 
+        mDrawable.setDisplayShield(displayShield);
         mBatteryIconView.setLayoutParams(scaledLayoutParams);
+        mBatteryIconView.invalidateDrawable(mDrawable);
     }
 
     @Override
diff --git a/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterViewController.java b/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterViewController.java
index ae9a323..77cb9d1 100644
--- a/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterViewController.java
@@ -29,6 +29,8 @@
 
 import com.android.systemui.broadcast.BroadcastDispatcher;
 import com.android.systemui.dagger.qualifiers.Main;
+import com.android.systemui.flags.FeatureFlags;
+import com.android.systemui.flags.Flags;
 import com.android.systemui.settings.CurrentUserTracker;
 import com.android.systemui.statusbar.phone.StatusBarIconController;
 import com.android.systemui.statusbar.policy.BatteryController;
@@ -84,6 +86,11 @@
                 public void onBatteryUnknownStateChanged(boolean isUnknown) {
                     mView.onBatteryUnknownStateChanged(isUnknown);
                 }
+
+                @Override
+                public void onIsOverheatedChanged(boolean isOverheated) {
+                    mView.onIsOverheatedChanged(isOverheated);
+                }
             };
 
     // Some places may need to show the battery conditionally, and not obey the tuner
@@ -98,6 +105,7 @@
             BroadcastDispatcher broadcastDispatcher,
             @Main Handler mainHandler,
             ContentResolver contentResolver,
+            FeatureFlags featureFlags,
             BatteryController batteryController) {
         super(view);
         mConfigurationController = configurationController;
@@ -106,6 +114,7 @@
         mBatteryController = batteryController;
 
         mView.setBatteryEstimateFetcher(mBatteryController::getEstimatedTimeRemainingString);
+        mView.setDisplayShieldEnabled(featureFlags.isEnabled(Flags.BATTERY_SHIELD_ICON));
 
         mSlotBattery = getResources().getString(com.android.internal.R.string.status_bar_battery);
         mSettingObserver = new SettingObserver(mainHandler);
diff --git a/packages/SystemUI/src/com/android/systemui/battery/BatterySpecs.kt b/packages/SystemUI/src/com/android/systemui/battery/BatterySpecs.kt
new file mode 100644
index 0000000..6455a96
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/battery/BatterySpecs.kt
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+package com.android.systemui.battery
+
+import com.android.settingslib.graph.ThemedBatteryDrawable
+
+/** An object storing specs related to the battery icon in the status bar. */
+object BatterySpecs {
+
+    /** Width of the main battery icon, not including the shield. */
+    const val BATTERY_WIDTH = ThemedBatteryDrawable.WIDTH
+    /** Height of the main battery icon, not including the shield. */
+    const val BATTERY_HEIGHT = ThemedBatteryDrawable.HEIGHT
+
+    private const val SHIELD_WIDTH = 10f
+    private const val SHIELD_HEIGHT = 13f
+
+    /**
+     * Amount that the left side of the shield should be offset from the left side of the battery.
+     */
+    const val SHIELD_LEFT_OFFSET = 8f
+    /** Amount that the top of the shield should be offset from the top of the battery. */
+    const val SHIELD_TOP_OFFSET = 10f
+
+    const val SHIELD_STROKE = 4f
+
+    /** The full width of the battery icon, including the main battery icon *and* the shield. */
+    const val BATTERY_WIDTH_WITH_SHIELD = SHIELD_LEFT_OFFSET + SHIELD_WIDTH
+    /** The full height of the battery icon, including the main battery icon *and* the shield. */
+    const val BATTERY_HEIGHT_WITH_SHIELD = SHIELD_TOP_OFFSET + SHIELD_HEIGHT
+
+    /**
+     * Given the desired height of the main battery icon in pixels, returns the height that the full
+     * battery icon will take up in pixels.
+     *
+     * If there's no shield, this will just return [mainBatteryHeight]. Otherwise, the shield
+     * extends slightly below the bottom of the main battery icon so we need some extra height.
+     */
+    @JvmStatic
+    fun getFullBatteryHeight(mainBatteryHeight: Float, displayShield: Boolean): Float {
+        return if (!displayShield) {
+            mainBatteryHeight
+        } else {
+            val verticalScaleFactor = mainBatteryHeight / BATTERY_HEIGHT
+            verticalScaleFactor * BATTERY_HEIGHT_WITH_SHIELD
+        }
+    }
+
+    /**
+     * Given the desired width of the main battery icon in pixels, returns the width that the full
+     * battery icon will take up in pixels.
+     *
+     * If there's no shield, this will just return [mainBatteryWidth]. Otherwise, the shield extends
+     * past the right side of the main battery icon so we need some extra width.
+     */
+    @JvmStatic
+    fun getFullBatteryWidth(mainBatteryWidth: Float, displayShield: Boolean): Float {
+        return if (!displayShield) {
+            mainBatteryWidth
+        } else {
+            val horizontalScaleFactor = mainBatteryWidth / BATTERY_WIDTH
+            horizontalScaleFactor * BATTERY_WIDTH_WITH_SHIELD
+        }
+    }
+
+    /**
+     * Given the height of the full battery icon, return how tall the main battery icon should be.
+     *
+     * If there's no shield, this will just return [fullBatteryHeight]. Otherwise, the shield takes
+     * up some of the view's height so the main battery width will be just a portion of
+     * [fullBatteryHeight].
+     */
+    @JvmStatic
+    fun getMainBatteryHeight(fullBatteryHeight: Float, displayShield: Boolean): Float {
+        return if (!displayShield) {
+            fullBatteryHeight
+        } else {
+            return (BATTERY_HEIGHT / BATTERY_HEIGHT_WITH_SHIELD) * fullBatteryHeight
+        }
+    }
+
+    /**
+     * Given the width of the full battery icon, return how wide the main battery icon should be.
+     *
+     * If there's no shield, this will just return [fullBatteryWidth]. Otherwise, the shield takes
+     * up some of the view's width so the main battery width will be just a portion of
+     * [fullBatteryWidth].
+     */
+    @JvmStatic
+    fun getMainBatteryWidth(fullBatteryWidth: Float, displayShield: Boolean): Float {
+        return if (!displayShield) {
+            fullBatteryWidth
+        } else {
+            return (BATTERY_WIDTH / BATTERY_WIDTH_WITH_SHIELD) * fullBatteryWidth
+        }
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/dagger/GlobalRootComponent.java b/packages/SystemUI/src/com/android/systemui/dagger/GlobalRootComponent.java
index fe89c9a..9e8c0ec 100644
--- a/packages/SystemUI/src/com/android/systemui/dagger/GlobalRootComponent.java
+++ b/packages/SystemUI/src/com/android/systemui/dagger/GlobalRootComponent.java
@@ -21,24 +21,21 @@
 import com.android.systemui.dagger.qualifiers.InstrumentationTest;
 import com.android.systemui.util.InitializationChecker;
 
-import javax.inject.Singleton;
-
 import dagger.BindsInstance;
-import dagger.Component;
 
 /**
  * Base root component for Dagger injection.
  *
+ * This class is not actually annotated as a Dagger component, since it is not used directly as one.
+ * Doing so generates unnecessary code bloat.
+ *
  * See {@link ReferenceGlobalRootComponent} for the one actually used by AOSP.
  */
-@Singleton
-@Component(modules = {GlobalModule.class})
 public interface GlobalRootComponent {
 
     /**
      * Builder for a GlobalRootComponent.
      */
-    @Component.Builder
     interface Builder {
         @BindsInstance
         Builder context(Context context);
diff --git a/packages/SystemUI/src/com/android/systemui/flags/Flags.kt b/packages/SystemUI/src/com/android/systemui/flags/Flags.kt
index 002ffdb..19fd25d 100644
--- a/packages/SystemUI/src/com/android/systemui/flags/Flags.kt
+++ b/packages/SystemUI/src/com/android/systemui/flags/Flags.kt
@@ -82,7 +82,10 @@
     // TODO(b/257506350): Tracking Bug
     val FSI_CHROME = unreleasedFlag(117, "fsi_chrome")
 
-    // next id: 118
+    // TODO(b/257315550): Tracking Bug
+    val NO_HUN_FOR_OLD_WHEN = unreleasedFlag(118, "no_hun_for_old_when")
+
+    // next id: 119
 
     // 200 - keyguard/lockscreen
     // ** Flag retired **
@@ -239,6 +242,9 @@
     // TODO(b/256613548): Tracking Bug
     val NEW_STATUS_BAR_WIFI_ICON_BACKEND = unreleasedFlag(609, "new_status_bar_wifi_icon_backend")
 
+    // TODO(b/256623670): Tracking Bug
+    @JvmField val BATTERY_SHIELD_ICON = unreleasedFlag(610, "battery_shield_icon")
+
     // 700 - dialer/calls
     // TODO(b/254512734): Tracking Bug
     val ONGOING_CALL_STATUS_BAR_CHIP = releasedFlag(700, "ongoing_call_status_bar_chip")
@@ -380,7 +386,8 @@
 
     // TODO(b/254513155): Tracking Bug
     @JvmField
-    val SCREENSHOT_WORK_PROFILE_POLICY = unreleasedFlag(1301, "screenshot_work_profile_policy")
+    val SCREENSHOT_WORK_PROFILE_POLICY =
+        unreleasedFlag(1301, "screenshot_work_profile_policy", teamfood = true)
 
     // 1400 - columbus
     // TODO(b/254512756): Tracking Bug
diff --git a/packages/SystemUI/src/com/android/systemui/shade/CombinedShadeHeadersConstraintManagerImpl.kt b/packages/SystemUI/src/com/android/systemui/shade/CombinedShadeHeadersConstraintManagerImpl.kt
index 4063af3..954534d 100644
--- a/packages/SystemUI/src/com/android/systemui/shade/CombinedShadeHeadersConstraintManagerImpl.kt
+++ b/packages/SystemUI/src/com/android/systemui/shade/CombinedShadeHeadersConstraintManagerImpl.kt
@@ -92,7 +92,6 @@
                     centerEnd,
                     ConstraintSet.END
                 )
-                constrainWidth(R.id.statusIcons, 0)
             },
             qsConstraintsChanges = {
                 setGuidelineBegin(centerStart, offsetFromEdge)
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/dagger/StatusBarViewModule.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/dagger/StatusBarViewModule.java
index dc90266..615f230 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/dagger/StatusBarViewModule.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/dagger/StatusBarViewModule.java
@@ -226,6 +226,7 @@
             BroadcastDispatcher broadcastDispatcher,
             @Main Handler mainHandler,
             ContentResolver contentResolver,
+            FeatureFlags featureFlags,
             BatteryController batteryController
     ) {
         return new BatteryMeterViewController(
@@ -235,6 +236,7 @@
                 broadcastDispatcher,
                 mainHandler,
                 contentResolver,
+                featureFlags,
                 batteryController);
 
     }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/BatteryController.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/BatteryController.java
index 149ed0a..d10d7cf 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/BatteryController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/BatteryController.java
@@ -155,6 +155,9 @@
 
         default void onWirelessChargingChanged(boolean isWirlessCharging) {
         }
+
+        default void onIsOverheatedChanged(boolean isOverheated) {
+        }
     }
 
     /**
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/BatteryControllerImpl.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/BatteryControllerImpl.java
index c7ad767..3c2ac7b 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/BatteryControllerImpl.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/BatteryControllerImpl.java
@@ -16,6 +16,9 @@
 
 package com.android.systemui.statusbar.policy;
 
+import static android.os.BatteryManager.BATTERY_HEALTH_OVERHEAT;
+import static android.os.BatteryManager.BATTERY_HEALTH_UNKNOWN;
+import static android.os.BatteryManager.EXTRA_HEALTH;
 import static android.os.BatteryManager.EXTRA_PRESENT;
 
 import android.annotation.WorkerThread;
@@ -87,6 +90,7 @@
     protected boolean mPowerSave;
     private boolean mAodPowerSave;
     private boolean mWirelessCharging;
+    private boolean mIsOverheated = false;
     private boolean mTestMode = false;
     @VisibleForTesting
     boolean mHasReceivedBattery = false;
@@ -184,6 +188,7 @@
         cb.onPowerSaveChanged(mPowerSave);
         cb.onBatteryUnknownStateChanged(mStateUnknown);
         cb.onWirelessChargingChanged(mWirelessCharging);
+        cb.onIsOverheatedChanged(mIsOverheated);
     }
 
     @Override
@@ -222,6 +227,13 @@
                 fireBatteryUnknownStateChanged();
             }
 
+            int batteryHealth = intent.getIntExtra(EXTRA_HEALTH, BATTERY_HEALTH_UNKNOWN);
+            boolean isOverheated = batteryHealth == BATTERY_HEALTH_OVERHEAT;
+            if (isOverheated != mIsOverheated) {
+                mIsOverheated = isOverheated;
+                fireIsOverheatedChanged();
+            }
+
             fireBatteryLevelChanged();
         } else if (action.equals(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED)) {
             updatePowerSave();
@@ -292,6 +304,10 @@
         return mPluggedChargingSource == BatteryManager.BATTERY_PLUGGED_WIRELESS;
     }
 
+    public boolean isOverheated() {
+        return mIsOverheated;
+    }
+
     @Override
     public void getEstimatedTimeRemainingString(EstimateFetchCompletion completion) {
         // Need to fetch or refresh the estimate, but it may involve binder calls so offload the
@@ -402,6 +418,15 @@
         }
     }
 
+    private void fireIsOverheatedChanged() {
+        synchronized (mChangeCallbacks) {
+            final int n = mChangeCallbacks.size();
+            for (int i = 0; i < n; i++) {
+                mChangeCallbacks.get(i).onIsOverheatedChanged(mIsOverheated);
+            }
+        }
+    }
+
     @Override
     public void dispatchDemoCommand(String command, Bundle args) {
         if (!mDemoModeController.isInDemoMode()) {
@@ -412,6 +437,7 @@
         String plugged = args.getString("plugged");
         String powerSave = args.getString("powersave");
         String present = args.getString("present");
+        String overheated = args.getString("overheated");
         if (level != null) {
             mLevel = Math.min(Math.max(Integer.parseInt(level), 0), 100);
         }
@@ -426,6 +452,10 @@
             mStateUnknown = !present.equals("true");
             fireBatteryUnknownStateChanged();
         }
+        if (overheated != null) {
+            mIsOverheated = overheated.equals("true");
+            fireIsOverheatedChanged();
+        }
         fireBatteryLevelChanged();
     }
 
diff --git a/packages/SystemUI/tests/src/com/android/systemui/battery/AccessorizedBatteryDrawableTest.kt b/packages/SystemUI/tests/src/com/android/systemui/battery/AccessorizedBatteryDrawableTest.kt
new file mode 100644
index 0000000..982f033
--- /dev/null
+++ b/packages/SystemUI/tests/src/com/android/systemui/battery/AccessorizedBatteryDrawableTest.kt
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.battery
+
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.battery.BatterySpecs.BATTERY_HEIGHT
+import com.android.systemui.battery.BatterySpecs.BATTERY_HEIGHT_WITH_SHIELD
+import com.android.systemui.battery.BatterySpecs.BATTERY_WIDTH
+import com.android.systemui.battery.BatterySpecs.BATTERY_WIDTH_WITH_SHIELD
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+
+@SmallTest
+class AccessorizedBatteryDrawableTest : SysuiTestCase() {
+    @Test
+    fun intrinsicSize_shieldFalse_isBatterySize() {
+        val drawable = AccessorizedBatteryDrawable(context, frameColor = 0)
+        drawable.displayShield = false
+
+        val density = context.resources.displayMetrics.density
+        assertThat(drawable.intrinsicHeight).isEqualTo((BATTERY_HEIGHT * density).toInt())
+        assertThat(drawable.intrinsicWidth).isEqualTo((BATTERY_WIDTH * density).toInt())
+    }
+
+    @Test
+    fun intrinsicSize_shieldTrue_isBatteryPlusShieldSize() {
+        val drawable = AccessorizedBatteryDrawable(context, frameColor = 0)
+        drawable.displayShield = true
+
+        val density = context.resources.displayMetrics.density
+        assertThat(drawable.intrinsicHeight)
+            .isEqualTo((BATTERY_HEIGHT_WITH_SHIELD * density).toInt())
+        assertThat(drawable.intrinsicWidth).isEqualTo((BATTERY_WIDTH_WITH_SHIELD * density).toInt())
+    }
+
+    // TODO(b/255625888): Screenshot tests for this drawable would be amazing!
+}
diff --git a/packages/SystemUI/tests/src/com/android/systemui/battery/BatteryMeterViewControllerTest.java b/packages/SystemUI/tests/src/com/android/systemui/battery/BatteryMeterViewControllerTest.java
index 1d038a4..bc8f961 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/battery/BatteryMeterViewControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/battery/BatteryMeterViewControllerTest.java
@@ -35,6 +35,8 @@
 
 import com.android.systemui.SysuiTestCase;
 import com.android.systemui.broadcast.BroadcastDispatcher;
+import com.android.systemui.flags.FakeFeatureFlags;
+import com.android.systemui.flags.Flags;
 import com.android.systemui.statusbar.policy.BatteryController;
 import com.android.systemui.statusbar.policy.ConfigurationController;
 import com.android.systemui.tuner.TunerService;
@@ -59,6 +61,7 @@
     private Handler mHandler;
     @Mock
     private ContentResolver mContentResolver;
+    private FakeFeatureFlags mFeatureFlags;
     @Mock
     private BatteryController mBatteryController;
 
@@ -71,19 +74,13 @@
         when(mBatteryMeterView.getContext()).thenReturn(mContext);
         when(mBatteryMeterView.getResources()).thenReturn(mContext.getResources());
 
-        mController = new BatteryMeterViewController(
-                mBatteryMeterView,
-                mConfigurationController,
-                mTunerService,
-                mBroadcastDispatcher,
-                mHandler,
-                mContentResolver,
-                mBatteryController
-        );
+        mFeatureFlags = new FakeFeatureFlags();
+        mFeatureFlags.set(Flags.BATTERY_SHIELD_ICON, false);
     }
 
     @Test
     public void onViewAttached_callbacksRegistered() {
+        initController();
         mController.onViewAttached();
 
         verify(mConfigurationController).addCallback(any());
@@ -101,6 +98,7 @@
 
     @Test
     public void onViewDetached_callbacksUnregistered() {
+        initController();
         // Set everything up first.
         mController.onViewAttached();
 
@@ -114,6 +112,7 @@
 
     @Test
     public void ignoreTunerUpdates_afterOnViewAttached_callbackUnregistered() {
+        initController();
         // Start out receiving tuner updates
         mController.onViewAttached();
 
@@ -124,10 +123,43 @@
 
     @Test
     public void ignoreTunerUpdates_beforeOnViewAttached_callbackNeverRegistered() {
+        initController();
+
         mController.ignoreTunerUpdates();
 
         mController.onViewAttached();
 
         verify(mTunerService, never()).addTunable(any(), any());
     }
+
+    @Test
+    public void shieldFlagDisabled_viewNotified() {
+        mFeatureFlags.set(Flags.BATTERY_SHIELD_ICON, false);
+
+        initController();
+
+        verify(mBatteryMeterView).setDisplayShieldEnabled(false);
+    }
+
+    @Test
+    public void shieldFlagEnabled_viewNotified() {
+        mFeatureFlags.set(Flags.BATTERY_SHIELD_ICON, true);
+
+        initController();
+
+        verify(mBatteryMeterView).setDisplayShieldEnabled(true);
+    }
+
+    private void initController() {
+        mController = new BatteryMeterViewController(
+                mBatteryMeterView,
+                mConfigurationController,
+                mTunerService,
+                mBroadcastDispatcher,
+                mHandler,
+                mContentResolver,
+                mFeatureFlags,
+                mBatteryController
+        );
+    }
 }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/battery/BatteryMeterViewTest.kt b/packages/SystemUI/tests/src/com/android/systemui/battery/BatteryMeterViewTest.kt
index b4ff2a5..eb7d9c3 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/battery/BatteryMeterViewTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/battery/BatteryMeterViewTest.kt
@@ -17,7 +17,9 @@
 
 import android.testing.AndroidTestingRunner
 import android.testing.TestableLooper.RunWithLooper
+import android.widget.ImageView
 import androidx.test.filters.SmallTest
+import com.android.systemui.R
 import com.android.systemui.SysuiTestCase
 import com.android.systemui.battery.BatteryMeterView.BatteryEstimateFetcher
 import com.android.systemui.statusbar.policy.BatteryController.EstimateFetchCompletion
@@ -58,6 +60,182 @@
         // No assert needed
     }
 
+    @Test
+    fun contentDescription_unknown() {
+        mBatteryMeterView.onBatteryUnknownStateChanged(true)
+
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(R.string.accessibility_battery_unknown)
+        )
+    }
+
+    @Test
+    fun contentDescription_estimate() {
+        mBatteryMeterView.onBatteryLevelChanged(15, false)
+        mBatteryMeterView.setPercentShowMode(BatteryMeterView.MODE_ESTIMATE)
+        mBatteryMeterView.setBatteryEstimateFetcher(Fetcher())
+
+        mBatteryMeterView.updatePercentText()
+
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(
+                        R.string.accessibility_battery_level_with_estimate, 15, ESTIMATE
+                )
+        )
+    }
+
+    @Test
+    fun contentDescription_estimateAndOverheated() {
+        mBatteryMeterView.onBatteryLevelChanged(17, false)
+        mBatteryMeterView.onIsOverheatedChanged(true)
+        mBatteryMeterView.setPercentShowMode(BatteryMeterView.MODE_ESTIMATE)
+        mBatteryMeterView.setBatteryEstimateFetcher(Fetcher())
+
+        mBatteryMeterView.updatePercentText()
+
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(
+                        R.string.accessibility_battery_level_charging_paused_with_estimate,
+                        17,
+                        ESTIMATE,
+                )
+        )
+    }
+
+    @Test
+    fun contentDescription_overheated() {
+        mBatteryMeterView.onBatteryLevelChanged(90, false)
+        mBatteryMeterView.onIsOverheatedChanged(true)
+
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(R.string.accessibility_battery_level_charging_paused, 90)
+        )
+    }
+
+    @Test
+    fun contentDescription_charging() {
+        mBatteryMeterView.onBatteryLevelChanged(45, true)
+
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(R.string.accessibility_battery_level_charging, 45)
+        )
+    }
+
+    @Test
+    fun contentDescription_notCharging() {
+        mBatteryMeterView.onBatteryLevelChanged(45, false)
+
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(R.string.accessibility_battery_level, 45)
+        )
+    }
+
+    @Test
+    fun changesFromEstimateToPercent_textAndContentDescriptionChanges() {
+        mBatteryMeterView.onBatteryLevelChanged(15, false)
+        mBatteryMeterView.setPercentShowMode(BatteryMeterView.MODE_ESTIMATE)
+        mBatteryMeterView.setBatteryEstimateFetcher(Fetcher())
+
+        mBatteryMeterView.updatePercentText()
+
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(
+                        R.string.accessibility_battery_level_with_estimate, 15, ESTIMATE
+                )
+        )
+
+        // Update the show mode from estimate to percent
+        mBatteryMeterView.setPercentShowMode(BatteryMeterView.MODE_ON)
+
+        assertThat(mBatteryMeterView.batteryPercentViewText).isEqualTo("15%")
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(R.string.accessibility_battery_level, 15)
+        )
+    }
+
+    @Test
+    fun contentDescription_manyUpdates_alwaysUpdated() {
+        // Overheated
+        mBatteryMeterView.onBatteryLevelChanged(90, false)
+        mBatteryMeterView.onIsOverheatedChanged(true)
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(R.string.accessibility_battery_level_charging_paused, 90)
+        )
+
+        // Overheated & estimate
+        mBatteryMeterView.setPercentShowMode(BatteryMeterView.MODE_ESTIMATE)
+        mBatteryMeterView.setBatteryEstimateFetcher(Fetcher())
+        mBatteryMeterView.updatePercentText()
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(
+                        R.string.accessibility_battery_level_charging_paused_with_estimate,
+                        90,
+                        ESTIMATE,
+                )
+        )
+
+        // Just estimate
+        mBatteryMeterView.onIsOverheatedChanged(false)
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(
+                        R.string.accessibility_battery_level_with_estimate,
+                        90,
+                        ESTIMATE,
+                )
+        )
+
+        // Just percent
+        mBatteryMeterView.setPercentShowMode(BatteryMeterView.MODE_ON)
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(R.string.accessibility_battery_level, 90)
+        )
+
+        // Charging
+        mBatteryMeterView.onBatteryLevelChanged(90, true)
+        assertThat(mBatteryMeterView.contentDescription).isEqualTo(
+                context.getString(R.string.accessibility_battery_level_charging, 90)
+        )
+    }
+
+    @Test
+    fun isOverheatedChanged_true_drawableGetsTrue() {
+        mBatteryMeterView.setDisplayShieldEnabled(true)
+        val drawable = getBatteryDrawable()
+
+        mBatteryMeterView.onIsOverheatedChanged(true)
+
+        assertThat(drawable.displayShield).isTrue()
+    }
+
+    @Test
+    fun isOverheatedChanged_false_drawableGetsFalse() {
+        mBatteryMeterView.setDisplayShieldEnabled(true)
+        val drawable = getBatteryDrawable()
+
+        // Start as true
+        mBatteryMeterView.onIsOverheatedChanged(true)
+
+        // Update to false
+        mBatteryMeterView.onIsOverheatedChanged(false)
+
+        assertThat(drawable.displayShield).isFalse()
+    }
+
+    @Test
+    fun isOverheatedChanged_true_featureflagOff_drawableGetsFalse() {
+        mBatteryMeterView.setDisplayShieldEnabled(false)
+        val drawable = getBatteryDrawable()
+
+        mBatteryMeterView.onIsOverheatedChanged(true)
+
+        assertThat(drawable.displayShield).isFalse()
+    }
+
+    private fun getBatteryDrawable(): AccessorizedBatteryDrawable {
+        return (mBatteryMeterView.getChildAt(0) as ImageView)
+                .drawable as AccessorizedBatteryDrawable
+    }
+
     private class Fetcher : BatteryEstimateFetcher {
         override fun fetchBatteryTimeRemainingEstimate(
                 completion: EstimateFetchCompletion) {
@@ -68,4 +246,4 @@
     private companion object {
         const val ESTIMATE = "2 hours 2 minutes"
     }
-}
\ No newline at end of file
+}
diff --git a/packages/SystemUI/tests/src/com/android/systemui/battery/BatterySpecsTest.kt b/packages/SystemUI/tests/src/com/android/systemui/battery/BatterySpecsTest.kt
new file mode 100644
index 0000000..39cb047
--- /dev/null
+++ b/packages/SystemUI/tests/src/com/android/systemui/battery/BatterySpecsTest.kt
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.battery
+
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.battery.BatterySpecs.BATTERY_HEIGHT
+import com.android.systemui.battery.BatterySpecs.BATTERY_HEIGHT_WITH_SHIELD
+import com.android.systemui.battery.BatterySpecs.BATTERY_WIDTH
+import com.android.systemui.battery.BatterySpecs.BATTERY_WIDTH_WITH_SHIELD
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+
+@SmallTest
+class BatterySpecsTest : SysuiTestCase() {
+    @Test
+    fun getFullBatteryHeight_shieldFalse_returnsMainHeight() {
+        val fullHeight = BatterySpecs.getFullBatteryHeight(56f, displayShield = false)
+
+        assertThat(fullHeight).isEqualTo(56f)
+    }
+
+    @Test
+    fun getFullBatteryHeight_shieldTrue_returnsMainHeightPlusShield() {
+        val mainHeight = BATTERY_HEIGHT * 5
+        val fullHeight = BatterySpecs.getFullBatteryHeight(mainHeight, displayShield = true)
+
+        // Since the main battery was scaled 5x, the output height should also be scaled 5x
+        val expectedFullHeight = BATTERY_HEIGHT_WITH_SHIELD * 5
+
+        assertThat(fullHeight).isWithin(.0001f).of(expectedFullHeight)
+    }
+
+    @Test
+    fun getFullBatteryWidth_shieldFalse_returnsMainWidth() {
+        val fullWidth = BatterySpecs.getFullBatteryWidth(33f, displayShield = false)
+
+        assertThat(fullWidth).isEqualTo(33f)
+    }
+
+    @Test
+    fun getFullBatteryWidth_shieldTrue_returnsMainWidthPlusShield() {
+        val mainWidth = BATTERY_WIDTH * 3.3f
+
+        val fullWidth = BatterySpecs.getFullBatteryWidth(mainWidth, displayShield = true)
+
+        // Since the main battery was scaled 3.3x, the output width should also be scaled 5x
+        val expectedFullWidth = BATTERY_WIDTH_WITH_SHIELD * 3.3f
+        assertThat(fullWidth).isWithin(.0001f).of(expectedFullWidth)
+    }
+
+    @Test
+    fun getMainBatteryHeight_shieldFalse_returnsFullHeight() {
+        val mainHeight = BatterySpecs.getMainBatteryHeight(89f, displayShield = false)
+
+        assertThat(mainHeight).isEqualTo(89f)
+    }
+
+    @Test
+    fun getMainBatteryHeight_shieldTrue_returnsNotFullHeight() {
+        val fullHeight = BATTERY_HEIGHT_WITH_SHIELD * 7.7f
+
+        val mainHeight = BatterySpecs.getMainBatteryHeight(fullHeight, displayShield = true)
+
+        // Since the full height was scaled 7.7x, the main height should also be scaled 7.7x.
+        val expectedHeight = BATTERY_HEIGHT * 7.7f
+        assertThat(mainHeight).isWithin(.0001f).of(expectedHeight)
+    }
+
+    @Test
+    fun getMainBatteryWidth_shieldFalse_returnsFullWidth() {
+        val mainWidth = BatterySpecs.getMainBatteryWidth(2345f, displayShield = false)
+
+        assertThat(mainWidth).isEqualTo(2345f)
+    }
+
+    @Test
+    fun getMainBatteryWidth_shieldTrue_returnsNotFullWidth() {
+        val fullWidth = BATTERY_WIDTH_WITH_SHIELD * 0.6f
+
+        val mainWidth = BatterySpecs.getMainBatteryWidth(fullWidth, displayShield = true)
+
+        // Since the full width was scaled 0.6x, the main height should also be scaled 0.6x.
+        val expectedWidth = BATTERY_WIDTH * 0.6f
+        assertThat(mainWidth).isWithin(.0001f).of(expectedWidth)
+    }
+}
diff --git a/packages/SystemUI/tests/src/com/android/systemui/shade/CombinedShadeHeaderConstraintsTest.kt b/packages/SystemUI/tests/src/com/android/systemui/shade/CombinedShadeHeaderConstraintsTest.kt
index 0ce9056..d7eb337 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/shade/CombinedShadeHeaderConstraintsTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/shade/CombinedShadeHeaderConstraintsTest.kt
@@ -24,6 +24,7 @@
 import com.android.systemui.R
 import com.android.systemui.SysuiTestCase
 import com.google.common.truth.Truth.assertThat
+import com.google.common.truth.Truth.assertWithMessage
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -320,6 +321,48 @@
         assertThat(changes.largeScreenConstraintsChanges).isNull()
     }
 
+    @Test
+    fun testRelevantViewsAreNotMatchConstraints() {
+        val views = mapOf(
+                R.id.clock to "clock",
+                R.id.date to "date",
+                R.id.statusIcons to "icons",
+                R.id.privacy_container to "privacy",
+                R.id.carrier_group to "carriers",
+                R.id.batteryRemainingIcon to "battery",
+        )
+        views.forEach { (id, name) ->
+            assertWithMessage("$name has 0 height in qqs")
+                    .that(qqsConstraint.getConstraint(id).layout.mHeight).isNotEqualTo(0)
+            assertWithMessage("$name has 0 width in qqs")
+                    .that(qqsConstraint.getConstraint(id).layout.mWidth).isNotEqualTo(0)
+            assertWithMessage("$name has 0 height in qs")
+                    .that(qsConstraint.getConstraint(id).layout.mHeight).isNotEqualTo(0)
+            assertWithMessage("$name has 0 width in qs")
+                    .that(qsConstraint.getConstraint(id).layout.mWidth).isNotEqualTo(0)
+        }
+    }
+
+    @Test
+    fun testCheckViewsDontChangeSizeBetweenAnimationConstraints() {
+        val views = mapOf(
+                R.id.clock to "clock",
+                R.id.date to "date",
+                R.id.statusIcons to "icons",
+                R.id.privacy_container to "privacy",
+                R.id.carrier_group to "carriers",
+                R.id.batteryRemainingIcon to "battery",
+        )
+        views.forEach { (id, name) ->
+            assertWithMessage("$name changes height")
+                    .that(qqsConstraint.getConstraint(id).layout.mHeight)
+                    .isEqualTo(qsConstraint.getConstraint(id).layout.mHeight)
+            assertWithMessage("$name changes width")
+                    .that(qqsConstraint.getConstraint(id).layout.mWidth)
+                    .isEqualTo(qsConstraint.getConstraint(id).layout.mWidth)
+        }
+    }
+
     private operator fun ConstraintsChanges.invoke() {
         qqsConstraintsChanges?.invoke(qqsConstraint)
         qsConstraintsChanges?.invoke(qsConstraint)
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/BatteryControllerTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/BatteryControllerTest.java
index 43d0fe9..1eee08c 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/BatteryControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/BatteryControllerTest.java
@@ -221,4 +221,33 @@
 
         Assert.assertFalse(mBatteryController.isChargingSourceDock());
     }
+
+    @Test
+    public void batteryStateChanged_healthNotOverheated_outputsFalse() {
+        Intent intent = new Intent(Intent.ACTION_BATTERY_CHANGED);
+        intent.putExtra(BatteryManager.EXTRA_HEALTH, BatteryManager.BATTERY_HEALTH_GOOD);
+
+        mBatteryController.onReceive(getContext(), intent);
+
+        Assert.assertFalse(mBatteryController.isOverheated());
+    }
+
+    @Test
+    public void batteryStateChanged_healthOverheated_outputsTrue() {
+        Intent intent = new Intent(Intent.ACTION_BATTERY_CHANGED);
+        intent.putExtra(BatteryManager.EXTRA_HEALTH, BatteryManager.BATTERY_HEALTH_OVERHEAT);
+
+        mBatteryController.onReceive(getContext(), intent);
+
+        Assert.assertTrue(mBatteryController.isOverheated());
+    }
+
+    @Test
+    public void batteryStateChanged_noHealthGiven_outputsFalse() {
+        Intent intent = new Intent(Intent.ACTION_BATTERY_CHANGED);
+
+        mBatteryController.onReceive(getContext(), intent);
+
+        Assert.assertFalse(mBatteryController.isOverheated());
+    }
 }
diff --git a/services/core/java/com/android/server/display/DisplayManagerService.java b/services/core/java/com/android/server/display/DisplayManagerService.java
index e51976b..ef1baf6 100644
--- a/services/core/java/com/android/server/display/DisplayManagerService.java
+++ b/services/core/java/com/android/server/display/DisplayManagerService.java
@@ -123,6 +123,7 @@
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.display.BrightnessSynchronizer;
 import com.android.internal.util.DumpUtils;
+import com.android.internal.util.FrameworkStatsLog;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.server.AnimationThread;
 import com.android.server.DisplayThread;
@@ -146,6 +147,7 @@
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.function.Consumer;
 
+
 /**
  * Manages attached displays.
  * <p>
@@ -1880,6 +1882,14 @@
                 if (displayDevice == null) {
                     return;
                 }
+                if (mLogicalDisplayMapper.getDisplayLocked(displayDevice)
+                        .getDisplayInfoLocked().type == Display.TYPE_INTERNAL) {
+                    FrameworkStatsLog.write(FrameworkStatsLog.BRIGHTNESS_CONFIGURATION_UPDATED,
+                                c.getCurve().first,
+                                c.getCurve().second,
+                                // should not be logged for virtual displays
+                                uniqueId);
+                }
                 mPersistentDataStore.setBrightnessConfigurationForDisplayLocked(c, displayDevice,
                         userSerial, packageName);
             } finally {
diff --git a/services/core/java/com/android/server/wm/ActivityTaskSupervisor.java b/services/core/java/com/android/server/wm/ActivityTaskSupervisor.java
index fe691c6..54664f5 100644
--- a/services/core/java/com/android/server/wm/ActivityTaskSupervisor.java
+++ b/services/core/java/com/android/server/wm/ActivityTaskSupervisor.java
@@ -27,6 +27,7 @@
 import static android.app.ActivityManager.START_FLAG_NATIVE_DEBUGGING;
 import static android.app.ActivityManager.START_FLAG_TRACK_ALLOCATION;
 import static android.app.ActivityManager.START_TASK_TO_FRONT;
+import static android.app.ActivityOptions.ANIM_REMOTE_ANIMATION;
 import static android.app.ITaskStackListener.FORCED_RESIZEABLE_REASON_SECONDARY_DISPLAY;
 import static android.app.ITaskStackListener.FORCED_RESIZEABLE_REASON_SPLIT_SCREEN;
 import static android.app.WaitResult.INVALID_DELAY;
@@ -2592,6 +2593,10 @@
                         // Apply options to prevent pendingOptions be taken when scheduling
                         // activity lifecycle transaction to make sure the override pending app
                         // transition will be applied immediately.
+                        if (activityOptions.getAnimationType() == ANIM_REMOTE_ANIMATION) {
+                            targetActivity.mPendingRemoteAnimation =
+                                    activityOptions.getRemoteAnimationAdapter();
+                        }
                         targetActivity.applyOptionsAnimation();
                         if (activityOptions != null && activityOptions.getLaunchCookie() != null) {
                             targetActivity.mLaunchCookie = activityOptions.getLaunchCookie();