diff --git a/OWNERS b/OWNERS
index a66bf54..22efa33 100644
--- a/OWNERS
+++ b/OWNERS
@@ -30,6 +30,7 @@
 jeremysim@google.com
 atsjenk@google.com
 brianji@google.com
+hwwang@google.com
 
 # Overview eng team
 alexchau@google.com
@@ -52,4 +53,4 @@
 per-file DeviceConfigWrapper.java = sunnygoyal@google.com, winsonc@google.com, adamcohen@google.com, hyunyoungs@google.com
 
 # Predictive Back
-per-file LauncherBackAnimationController.java = shanh@google.com, gallmann@google.com
\ No newline at end of file
+per-file LauncherBackAnimationController.java = shanh@google.com, gallmann@google.com
diff --git a/quickstep/src/com/android/launcher3/model/QuickstepModelDelegate.java b/quickstep/src/com/android/launcher3/model/QuickstepModelDelegate.java
index 8b5ed7c..6af5a30 100644
--- a/quickstep/src/com/android/launcher3/model/QuickstepModelDelegate.java
+++ b/quickstep/src/com/android/launcher3/model/QuickstepModelDelegate.java
@@ -205,6 +205,7 @@
         mActive = true;
     }
 
+    @WorkerThread
     @Override
     public void workspaceLoadComplete() {
         super.workspaceLoadComplete();
@@ -323,6 +324,7 @@
         }
     }
 
+    @WorkerThread
     @Override
     public void destroy() {
         super.destroy();
diff --git a/quickstep/src/com/android/launcher3/model/WellbeingModel.java b/quickstep/src/com/android/launcher3/model/WellbeingModel.java
index a7c9652..28bc01c 100644
--- a/quickstep/src/com/android/launcher3/model/WellbeingModel.java
+++ b/quickstep/src/com/android/launcher3/model/WellbeingModel.java
@@ -111,6 +111,7 @@
         mWorkerHandler.post(this::initializeInBackground);
     }
 
+    @WorkerThread
     private void initializeInBackground() {
         if (!TextUtils.isEmpty(mWellbeingProviderPkg)) {
             mContext.registerReceiver(
@@ -134,8 +135,8 @@
     public void close() {
         if (!TextUtils.isEmpty(mWellbeingProviderPkg)) {
             mWorkerHandler.post(() -> {
-                mWellbeingAppChangeReceiver.unregisterReceiverSafely(mContext);
-                mAppAddRemoveReceiver.unregisterReceiverSafely(mContext);
+                mWellbeingAppChangeReceiver.unregisterReceiverSafelySync(mContext);
+                mAppAddRemoveReceiver.unregisterReceiverSafelySync(mContext);
                 mContext.getContentResolver().unregisterContentObserver(mContentObserver);
             });
         }
diff --git a/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java b/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java
index 81581b8..63e1e01 100644
--- a/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java
@@ -47,6 +47,7 @@
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_SCREEN_PINNING;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_SHORTCUT_HELPER_SHOWING;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_VOICE_INTERACTION_WINDOW_SHOWING;
+import static com.android.wm.shell.Flags.enableTaskbarOnPhones;
 
 import android.animation.ArgbEvaluator;
 import android.animation.ObjectAnimator;
@@ -678,14 +679,19 @@
                 mLightIconColorOnHome,
                 mDarkIconColorOnHome);
 
-        // Override the color from framework if nav buttons are over an opaque Taskbar surface.
-        final int iconColor = (int) argbEvaluator.evaluate(
-                mOnBackgroundNavButtonColorOverrideMultiplier.value
-                        * Math.max(
-                                mOnTaskbarBackgroundNavButtonColorOverride.value,
-                                mSlideInViewVisibleNavButtonColorOverride.value),
-                sysUiNavButtonIconColorOnHome,
-                mOnBackgroundIconColor);
+        final int iconColor;
+        if (ENABLE_TASKBAR_NAVBAR_UNIFICATION && enableTaskbarOnPhones()
+                && mContext.isPhoneMode()) {
+            iconColor = sysUiNavButtonIconColorOnHome;
+        } else {
+            // Override the color from framework if nav buttons are over an opaque Taskbar surface.
+            iconColor = (int) argbEvaluator.evaluate(
+                    mOnBackgroundNavButtonColorOverrideMultiplier.value * Math.max(
+                            mOnTaskbarBackgroundNavButtonColorOverride.value,
+                            mSlideInViewVisibleNavButtonColorOverride.value),
+                    sysUiNavButtonIconColorOnHome,
+                    mOnBackgroundIconColor);
+        }
 
         for (ImageView button : mAllButtons) {
             button.setImageTintList(ColorStateList.valueOf(iconColor));
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
index f703463..a9b34d2 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
@@ -18,7 +18,6 @@
 import static android.view.KeyEvent.ACTION_UP;
 import static android.view.KeyEvent.KEYCODE_BACK;
 
-import static com.android.launcher3.Flags.enableScalingRevealHomeAnimation;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_TASKBAR_NAVBAR_UNIFICATION;
 
 import android.content.Context;
@@ -42,7 +41,6 @@
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.testing.TestLogging;
 import com.android.launcher3.testing.shared.TestProtocol;
-import com.android.launcher3.util.DisplayController;
 import com.android.launcher3.util.MultiPropertyFactory;
 import com.android.launcher3.util.MultiPropertyFactory.MultiProperty;
 import com.android.launcher3.views.BaseDragLayer;
@@ -106,10 +104,6 @@
         mTaskbarBackgroundAlpha = new MultiPropertyFactory<>(this, BG_ALPHA, INDEX_COUNT,
                 (a, b) -> a * b, 1f);
         mTaskbarBackgroundAlpha.get(INDEX_ALL_OTHER_STATES).setValue(0);
-        mTaskbarBackgroundAlpha.get(INDEX_STASH_ANIM).setValue(
-                enableScalingRevealHomeAnimation() && DisplayController.isTransientTaskbar(context)
-                        ? 0
-                        : 1);
     }
 
     public void init(TaskbarDragLayerController.TaskbarDragLayerCallbacks callbacks) {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java
index 2a58db2..051bdc8 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java
@@ -304,7 +304,7 @@
                 .register(NAV_BAR_KIDS_MODE, mOnSettingsChangeListener);
         Log.d(TASKBAR_NOT_DESTROYED_TAG, "registering component callbacks from constructor.");
         mContext.registerComponentCallbacks(mComponentCallbacks);
-        mShutdownReceiver.register(mContext, Intent.ACTION_SHUTDOWN);
+        mShutdownReceiver.registerAsync(mContext, Intent.ACTION_SHUTDOWN);
         UI_HELPER_EXECUTOR.execute(() -> {
             mSharedState.taskbarSystemActionPendingIntent = PendingIntent.getBroadcast(
                     mContext,
@@ -582,8 +582,7 @@
     public void destroy() {
         debugWhyTaskbarNotDestroyed("TaskbarManager#destroy()");
         removeActivityCallbacksAndListeners();
-        UI_HELPER_EXECUTOR.execute(
-                () -> mTaskbarBroadcastReceiver.unregisterReceiverSafely(mContext));
+        mTaskbarBroadcastReceiver.unregisterReceiverSafelyAsync(mContext);
         destroyExistingTaskbar();
         removeTaskbarRootViewFromWindow();
         if (mUserUnlocked) {
@@ -595,7 +594,7 @@
                 .unregister(NAV_BAR_KIDS_MODE, mOnSettingsChangeListener);
         Log.d(TASKBAR_NOT_DESTROYED_TAG, "unregistering component callbacks from destroy().");
         mContext.unregisterComponentCallbacks(mComponentCallbacks);
-        mContext.unregisterReceiver(mShutdownReceiver);
+        mShutdownReceiver.unregisterReceiverSafelyAsync(mContext);
     }
 
     public @Nullable TaskbarActivityContext getCurrentActivityContext() {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
index 6279903..fa2d907 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
@@ -338,7 +338,16 @@
         // For now, assume we're in an app, since LauncherTaskbarUIController won't be able to tell
         // us that we're paused until a bit later. This avoids flickering upon recreating taskbar.
         updateStateForFlag(FLAG_IN_APP, true);
+
         applyState(/* duration = */ 0);
+
+        // Hide the background while stashed so it doesn't show on fast swipes home
+        boolean shouldHideTaskbarBackground = enableScalingRevealHomeAnimation()
+                && DisplayController.isTransientTaskbar(mActivity)
+                && isStashed();
+
+        mTaskbarBackgroundAlphaForStash.setValue(shouldHideTaskbarBackground ? 0 : 1);
+
         if (mTaskbarSharedState.getTaskbarWasPinned()
                 || !mTaskbarSharedState.taskbarWasStashedAuto) {
             tryStartTaskbarTimeout();
diff --git a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
index 93f72fc..fb2a982 100644
--- a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
+++ b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
@@ -1205,17 +1205,28 @@
     }
 
     /** @return Whether this was the task we were waiting to appear, and thus handled it. */
-    protected boolean handleTaskAppeared(RemoteAnimationTarget[] appearedTaskTarget) {
+    protected boolean handleTaskAppeared(@NonNull RemoteAnimationTarget[] appearedTaskTargets,
+            @NonNull ActiveGestureLog.CompoundString failureReason) {
         if (mStateCallback.hasStates(STATE_HANDLER_INVALIDATED)) {
+            failureReason.append("State handler was invalidated");
             return false;
         }
-        boolean hasStartedTaskBefore = Arrays.stream(appearedTaskTarget).anyMatch(
-                mGestureState.mLastStartedTaskIdPredicate);
-        if (mStateCallback.hasStates(STATE_START_NEW_TASK) && hasStartedTaskBefore) {
-            reset();
-            return true;
+        boolean stateStartNewTaskSet = mStateCallback.hasStates(STATE_START_NEW_TASK);
+        if (!stateStartNewTaskSet || !hasStartedTaskBefore(appearedTaskTargets)) {
+            if (!stateStartNewTaskSet) {
+                failureReason.append("STATE_START_NEW_TASK was never set");
+            } else {
+                TaskInfo taskInfo = appearedTaskTargets[0].taskInfo;
+                failureReason.append("Unexpected task appeared")
+                                .append(" id=")
+                                .append(taskInfo.taskId)
+                                .append(" pkg=")
+                                .append(taskInfo.baseIntent.getComponent().getPackageName());
+            }
+            return false;
         }
-        return false;
+        reset();
+        return true;
     }
 
     private float dpiFromPx(float pixels) {
@@ -1796,6 +1807,8 @@
                 && (windowRotation == ROTATION_90 || windowRotation == ROTATION_270)) {
             builder.setFromRotation(mRemoteTargetHandles[0].getTaskViewSimulator(), windowRotation,
                     taskInfo.displayCutoutInsets);
+        } else if (taskInfo.displayCutoutInsets != null) {
+            builder.setDisplayCutoutInsets(taskInfo.displayCutoutInsets);
         }
         final SwipePipToHomeAnimator swipePipToHomeAnimator = builder.build();
         AnimatorPlaybackController activityAnimationToHome =
@@ -2400,14 +2413,18 @@
         }
     }
 
+    private boolean hasStartedTaskBefore(@NonNull RemoteAnimationTarget[] appearedTaskTargets) {
+        return Arrays.stream(appearedTaskTargets)
+                .anyMatch(mGestureState.mLastStartedTaskIdPredicate);
+    }
+
     @Override
     public void onTasksAppeared(@NonNull RemoteAnimationTarget[] appearedTaskTargets) {
         if (mRecentsAnimationController == null) {
             return;
         }
-        boolean hasStartedTaskBefore = Arrays.stream(appearedTaskTargets).anyMatch(
-                mGestureState.mLastStartedTaskIdPredicate);
-        if (!mStateCallback.hasStates(STATE_GESTURE_COMPLETED) && !hasStartedTaskBefore) {
+        if (!mStateCallback.hasStates(STATE_GESTURE_COMPLETED)
+                && !hasStartedTaskBefore(appearedTaskTargets)) {
             // This is a special case, if a task is started mid-gesture that wasn't a part of a
             // previous quickswitch task launch, then cancel the animation back to the app
             RemoteAnimationTarget appearedTaskTarget = appearedTaskTargets[0];
@@ -2421,7 +2438,11 @@
             finishRecentsAnimationOnTasksAppeared(null /* onFinishComplete */);
             return;
         }
-        if (!handleTaskAppeared(appearedTaskTargets)) {
+        ActiveGestureLog.CompoundString handleTaskFailureReason =
+                new ActiveGestureLog.CompoundString("handleTaskAppeared check failed: ");
+        if (!handleTaskAppeared(appearedTaskTargets, handleTaskFailureReason)) {
+            ActiveGestureLog.INSTANCE.addLog(handleTaskFailureReason);
+            finishRecentsAnimationOnTasksAppeared(null /* onFinishComplete */);
             return;
         }
         Optional<RemoteAnimationTarget> taskTargetOptional =
diff --git a/quickstep/src/com/android/quickstep/FallbackSwipeHandler.java b/quickstep/src/com/android/quickstep/FallbackSwipeHandler.java
index 625b6c6..9b66154 100644
--- a/quickstep/src/com/android/quickstep/FallbackSwipeHandler.java
+++ b/quickstep/src/com/android/quickstep/FallbackSwipeHandler.java
@@ -64,6 +64,7 @@
 import com.android.launcher3.util.DisplayController;
 import com.android.quickstep.fallback.FallbackRecentsView;
 import com.android.quickstep.fallback.RecentsState;
+import com.android.quickstep.util.ActiveGestureLog;
 import com.android.quickstep.util.RectFSpringAnim;
 import com.android.quickstep.util.SurfaceTransaction.SurfaceProperties;
 import com.android.quickstep.util.TransformParams;
@@ -170,14 +171,16 @@
     }
 
     @Override
-    protected boolean handleTaskAppeared(RemoteAnimationTarget[] appearedTaskTarget) {
+    protected boolean handleTaskAppeared(@NonNull RemoteAnimationTarget[] appearedTaskTarget,
+            @NonNull ActiveGestureLog.CompoundString failureReason) {
         if (mActiveAnimationFactory != null
                 && mActiveAnimationFactory.handleHomeTaskAppeared(appearedTaskTarget)) {
             mActiveAnimationFactory = null;
+            failureReason.append("(FallbackSwipeHandler) should be handled as home task appeared");
             return false;
         }
 
-        return super.handleTaskAppeared(appearedTaskTarget);
+        return super.handleTaskAppeared(appearedTaskTarget, failureReason);
     }
 
     @Override
diff --git a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
index a71e314..9c64576 100644
--- a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
+++ b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
@@ -36,6 +36,7 @@
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
 
 import com.android.launcher3.R;
 import com.android.launcher3.util.SimpleBroadcastReceiver;
@@ -101,7 +102,7 @@
             mConfigChangesMap.append(fallbackComponent.hashCode(), fallbackInfo.configChanges);
         } catch (PackageManager.NameNotFoundException ignored) { /* Impossible */ }
 
-        mUserPreferenceChangeReceiver.register(mContext, ACTION_PREFERRED_ACTIVITY_CHANGED);
+        mUserPreferenceChangeReceiver.registerAsync(mContext, ACTION_PREFERRED_ACTIVITY_CHANGED);
         updateOverviewTargets();
     }
 
@@ -114,6 +115,8 @@
         mOverviewChangeListener = overviewChangeListener;
     }
 
+    /** Called on {@link TouchInteractionService#onSystemUiFlagsChanged} */
+    @UiThread
     public void onSystemUiStateChanged() {
         if (mDeviceState.isHomeDisabled() != mIsHomeDisabled) {
             updateOverviewTargets();
@@ -128,6 +131,7 @@
      * Update overview intent and {@link BaseActivityInterface} based off the current launcher home
      * component.
      */
+    @UiThread
     private void updateOverviewTargets() {
         ComponentName defaultHome = PackageManagerWrapper.getInstance()
                 .getHomeActivities(new ArrayList<>());
@@ -187,8 +191,9 @@
                 unregisterOtherHomeAppUpdateReceiver();
 
                 mUpdateRegisteredPackage = defaultHome.getPackageName();
-                mOtherHomeAppUpdateReceiver.registerPkgActions(mContext, mUpdateRegisteredPackage,
-                        ACTION_PACKAGE_ADDED, ACTION_PACKAGE_CHANGED, ACTION_PACKAGE_REMOVED);
+                mOtherHomeAppUpdateReceiver.registerPkgActionsAsync(
+                        mContext, mUpdateRegisteredPackage, ACTION_PACKAGE_ADDED,
+                        ACTION_PACKAGE_CHANGED, ACTION_PACKAGE_REMOVED);
             }
         }
         mOverviewChangeListener.accept(mIsHomeAndOverviewSame);
@@ -198,13 +203,13 @@
      * Clean up any registered receivers.
      */
     public void onDestroy() {
-        mContext.unregisterReceiver(mUserPreferenceChangeReceiver);
+        mUserPreferenceChangeReceiver.unregisterReceiverSafelyAsync(mContext);
         unregisterOtherHomeAppUpdateReceiver();
     }
 
     private void unregisterOtherHomeAppUpdateReceiver() {
         if (mUpdateRegisteredPackage != null) {
-            mContext.unregisterReceiver(mOtherHomeAppUpdateReceiver);
+            mOtherHomeAppUpdateReceiver.unregisterReceiverSafelyAsync(mContext);
             mUpdateRegisteredPackage = null;
         }
     }
diff --git a/quickstep/src/com/android/quickstep/util/AsyncClockEventDelegate.java b/quickstep/src/com/android/quickstep/util/AsyncClockEventDelegate.java
index cda87c0..c26fc0c5 100644
--- a/quickstep/src/com/android/quickstep/util/AsyncClockEventDelegate.java
+++ b/quickstep/src/com/android/quickstep/util/AsyncClockEventDelegate.java
@@ -18,8 +18,6 @@
 import static android.content.Intent.ACTION_TIMEZONE_CHANGED;
 import static android.content.Intent.ACTION_TIME_CHANGED;
 
-import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
-
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -64,9 +62,7 @@
     private AsyncClockEventDelegate(Context context) {
         super(context);
         mContext = context;
-
-        UI_HELPER_EXECUTOR.execute(() ->
-                mReceiver.register(mContext, ACTION_TIME_CHANGED, ACTION_TIMEZONE_CHANGED));
+        mReceiver.registerAsync(mContext, ACTION_TIME_CHANGED, ACTION_TIMEZONE_CHANGED);
     }
 
     @Override
@@ -127,6 +123,6 @@
     public void close() {
         mDestroyed = true;
         SettingsCache.INSTANCE.get(mContext).unregister(mFormatUri, this);
-        UI_HELPER_EXECUTOR.execute(() -> mReceiver.unregisterReceiverSafely(mContext));
+        mReceiver.unregisterReceiverSafelyAsync(mContext);
     }
 }
diff --git a/quickstep/src/com/android/quickstep/util/SwipePipToHomeAnimator.java b/quickstep/src/com/android/quickstep/util/SwipePipToHomeAnimator.java
index 2b944bc..88c3a08 100644
--- a/quickstep/src/com/android/quickstep/util/SwipePipToHomeAnimator.java
+++ b/quickstep/src/com/android/quickstep/util/SwipePipToHomeAnimator.java
@@ -442,13 +442,21 @@
             return this;
         }
 
+        public Builder setDisplayCutoutInsets(@NonNull Rect displayCutoutInsets) {
+            mDisplayCutoutInsets = new Rect(displayCutoutInsets);
+            return this;
+        }
+
         public SwipePipToHomeAnimator build() {
             if (mDestinationBoundsTransformed.isEmpty()) {
                 mDestinationBoundsTransformed.set(mDestinationBounds);
             }
             // adjust the mSourceRectHint / mAppBounds by display cutout if applicable.
             if (mSourceRectHint != null && mDisplayCutoutInsets != null) {
-                if (mFromRotation == Surface.ROTATION_90) {
+                if (mFromRotation == Surface.ROTATION_0 && mDisplayCutoutInsets.top >= 0) {
+                    // TODO: this is to special case the issues on Pixel Foldable device(s).
+                    mSourceRectHint.offset(mDisplayCutoutInsets.left, mDisplayCutoutInsets.top);
+                } else if (mFromRotation == Surface.ROTATION_90) {
                     mSourceRectHint.offset(mDisplayCutoutInsets.left, mDisplayCutoutInsets.top);
                 } else if (mFromRotation == Surface.ROTATION_270) {
                     mAppBounds.inset(mDisplayCutoutInsets);
@@ -462,15 +470,6 @@
         }
     }
 
-    private static class RotatedPosition {
-        private final float degree;
-        private final float positionX;
-        private final float positionY;
-
-        private RotatedPosition(float degree, float positionX, float positionY) {
-            this.degree = degree;
-            this.positionX = positionX;
-            this.positionY = positionY;
-        }
+    private record RotatedPosition(float degree, float positionX, float positionY) {
     }
 }
diff --git a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarModeRule.kt b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarModeRule.kt
new file mode 100644
index 0000000..3b53cdc
--- /dev/null
+++ b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarModeRule.kt
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2024 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.launcher3.taskbar
+
+import com.android.launcher3.taskbar.TaskbarModeRule.Mode
+import com.android.launcher3.taskbar.TaskbarModeRule.TaskbarMode
+import com.android.launcher3.util.DisplayController
+import com.android.launcher3.util.MainThreadInitializedObject
+import com.android.launcher3.util.MainThreadInitializedObject.SandboxContext
+import com.android.launcher3.util.NavigationMode
+import org.junit.rules.TestRule
+import org.junit.runner.Description
+import org.junit.runners.model.Statement
+import org.mockito.kotlin.doReturn
+import org.mockito.kotlin.spy
+
+/**
+ * Allows tests to specify which Taskbar [Mode] to run under.
+ *
+ * [context] should match the test's target context, so that [MainThreadInitializedObject] instances
+ * are properly sandboxed.
+ *
+ * Annotate tests with [TaskbarMode] to set a mode. If the annotation is omitted for any tests, this
+ * rule is a no-op.
+ *
+ * Make sure this rule precedes any rules that depend on [DisplayController], or else the instance
+ * might be inconsistent across the test lifecycle.
+ */
+class TaskbarModeRule(private val context: SandboxContext) : TestRule {
+    /** The selected Taskbar mode. */
+    enum class Mode {
+        TRANSIENT,
+        PINNED,
+        THREE_BUTTONS,
+    }
+
+    /** Overrides Taskbar [mode] for a test. */
+    @Retention(AnnotationRetention.RUNTIME)
+    @Target(AnnotationTarget.FUNCTION)
+    annotation class TaskbarMode(val mode: Mode)
+
+    override fun apply(base: Statement, description: Description): Statement {
+        val taskbarMode = description.getAnnotation(TaskbarMode::class.java) ?: return base
+
+        return object : Statement() {
+            override fun evaluate() {
+                val mode = taskbarMode.mode
+
+                context.putObject(
+                    DisplayController.INSTANCE,
+                    object : DisplayController(context) {
+                        override fun getInfo(): Info {
+                            return spy(super.getInfo()) {
+                                on { isTransientTaskbar } doReturn (mode == Mode.TRANSIENT)
+                                on { isPinnedTaskbar } doReturn (mode == Mode.PINNED)
+                                on { navigationMode } doReturn
+                                    when (mode) {
+                                        Mode.TRANSIENT,
+                                        Mode.PINNED -> NavigationMode.NO_BUTTON
+                                        Mode.THREE_BUTTONS -> NavigationMode.THREE_BUTTONS
+                                    }
+                            }
+                        }
+                    },
+                )
+
+                base.evaluate()
+            }
+        }
+    }
+}
diff --git a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarModeRuleTest.kt b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarModeRuleTest.kt
new file mode 100644
index 0000000..7dfbb9a
--- /dev/null
+++ b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarModeRuleTest.kt
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2024 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.launcher3.taskbar
+
+import androidx.test.platform.app.InstrumentationRegistry.getInstrumentation
+import com.android.launcher3.InvariantDeviceProfile
+import com.android.launcher3.taskbar.TaskbarModeRule.Mode.PINNED
+import com.android.launcher3.taskbar.TaskbarModeRule.Mode.THREE_BUTTONS
+import com.android.launcher3.taskbar.TaskbarModeRule.Mode.TRANSIENT
+import com.android.launcher3.taskbar.TaskbarModeRule.TaskbarMode
+import com.android.launcher3.util.DisplayController
+import com.android.launcher3.util.LauncherMultivalentJUnit
+import com.android.launcher3.util.MainThreadInitializedObject.SandboxContext
+import com.android.launcher3.util.NavigationMode
+import com.google.common.truth.Truth.assertThat
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(LauncherMultivalentJUnit::class)
+class TaskbarModeRuleTest {
+
+    private val context = SandboxContext(getInstrumentation().targetContext)
+
+    @get:Rule val taskbarModeRule = TaskbarModeRule(context)
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testTaskbarMode_transient_overridesDisplayController() {
+        assertThat(DisplayController.isTransientTaskbar(context)).isTrue()
+        assertThat(DisplayController.isPinnedTaskbar(context)).isFalse()
+        assertThat(DisplayController.getNavigationMode(context)).isEqualTo(NavigationMode.NO_BUTTON)
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testTaskbarMode_transient_overridesDeviceProfile() {
+        val dp = InvariantDeviceProfile.INSTANCE.get(context).getDeviceProfile(context)
+        assertThat(dp.isTransientTaskbar).isTrue()
+        assertThat(dp.isGestureMode).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testTaskbarMode_pinned_overridesDisplayController() {
+        assertThat(DisplayController.isTransientTaskbar(context)).isFalse()
+        assertThat(DisplayController.isPinnedTaskbar(context)).isTrue()
+        assertThat(DisplayController.getNavigationMode(context)).isEqualTo(NavigationMode.NO_BUTTON)
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testTaskbarMode_pinned_overridesDeviceProfile() {
+        val dp = InvariantDeviceProfile.INSTANCE.get(context).getDeviceProfile(context)
+        assertThat(dp.isTransientTaskbar).isFalse()
+        assertThat(dp.isGestureMode).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(THREE_BUTTONS)
+    fun testTaskbarMode_threeButtons_overridesDisplayController() {
+        assertThat(DisplayController.isTransientTaskbar(context)).isFalse()
+        assertThat(DisplayController.isPinnedTaskbar(context)).isFalse()
+        assertThat(DisplayController.getNavigationMode(context))
+            .isEqualTo(NavigationMode.THREE_BUTTONS)
+    }
+
+    @Test
+    @TaskbarMode(THREE_BUTTONS)
+    fun testTaskbarMode_threeButtons_overridesDeviceProfile() {
+        val dp = InvariantDeviceProfile.INSTANCE.get(context).getDeviceProfile(context)
+        assertThat(dp.isTransientTaskbar).isFalse()
+        assertThat(dp.isGestureMode).isFalse()
+    }
+}
diff --git a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarUnitTestRule.kt b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarUnitTestRule.kt
index a999e7f..1c900b8 100644
--- a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarUnitTestRule.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarUnitTestRule.kt
@@ -18,6 +18,7 @@
 
 import android.app.Instrumentation
 import android.app.PendingIntent
+import android.content.Context
 import android.content.IIntentSender
 import android.content.Intent
 import androidx.test.platform.app.InstrumentationRegistry
@@ -37,6 +38,8 @@
 /**
  * Manages the Taskbar lifecycle for unit tests.
  *
+ * Tests need to provide their target [context] through the constructor.
+ *
  * See [InjectController] for grabbing controller(s) under test with minimal boilerplate.
  *
  * The rule interacts with [TaskbarManager] on the main thread. A good rule of thumb for tests is
@@ -58,7 +61,7 @@
  * }
  * ```
  */
-class TaskbarUnitTestRule : MethodRule {
+class TaskbarUnitTestRule(private val context: Context) : MethodRule {
     private val instrumentation = InstrumentationRegistry.getInstrumentation()
     private val serviceTestRule = ServiceTestRule()
 
@@ -76,7 +79,6 @@
             override fun evaluate() {
                 this@TaskbarUnitTestRule.target = target
 
-                val context = instrumentation.targetContext
                 instrumentation.runOnMainSync {
                     assumeTrue(
                         LauncherAppState.getIDP(context).getDeviceProfile(context).isTaskbarPresent
diff --git a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsControllerTest.kt b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsControllerTest.kt
index fe4e2d2..9a514bf 100644
--- a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsControllerTest.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsControllerTest.kt
@@ -42,7 +42,7 @@
 @EmulatedDevices(["pixelFoldable2023", "pixelTablet2023"])
 class TaskbarAllAppsControllerTest {
 
-    @get:Rule val taskbarUnitTestRule = TaskbarUnitTestRule()
+    @get:Rule val taskbarUnitTestRule = TaskbarUnitTestRule(getInstrumentation().targetContext)
     @get:Rule val animatorTestRule = AnimatorTestRule(this)
 
     @InjectController lateinit var allAppsController: TaskbarAllAppsController
diff --git a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayControllerTest.kt b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayControllerTest.kt
index eebd8f9..918ec7d 100644
--- a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayControllerTest.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/overlay/TaskbarOverlayControllerTest.kt
@@ -41,7 +41,7 @@
 @EmulatedDevices(["pixelFoldable2023"])
 class TaskbarOverlayControllerTest {
 
-    @get:Rule val taskbarUnitTestRule = TaskbarUnitTestRule()
+    @get:Rule val taskbarUnitTestRule = TaskbarUnitTestRule(getInstrumentation().targetContext)
     @InjectController lateinit var overlayController: TaskbarOverlayController
 
     private val taskbarContext: TaskbarActivityContext
diff --git a/src/com/android/launcher3/LauncherAppState.java b/src/com/android/launcher3/LauncherAppState.java
index 3b8ff62..239967d 100644
--- a/src/com/android/launcher3/LauncherAppState.java
+++ b/src/com/android/launcher3/LauncherAppState.java
@@ -116,13 +116,13 @@
 
         SimpleBroadcastReceiver modelChangeReceiver =
                 new SimpleBroadcastReceiver(mModel::onBroadcastIntent);
-        modelChangeReceiver.register(mContext, Intent.ACTION_LOCALE_CHANGED,
+        modelChangeReceiver.registerAsync(mContext, Intent.ACTION_LOCALE_CHANGED,
                 ACTION_DEVICE_POLICY_RESOURCE_UPDATED);
         if (BuildConfig.IS_STUDIO_BUILD) {
             mContext.registerReceiver(modelChangeReceiver, new IntentFilter(ACTION_FORCE_ROLOAD),
                     RECEIVER_EXPORTED);
         }
-        mOnTerminateCallback.add(() -> mContext.unregisterReceiver(modelChangeReceiver));
+        mOnTerminateCallback.add(() -> modelChangeReceiver.unregisterReceiverSafelyAsync(mContext));
 
         SafeCloseable userChangeListener = UserCache.INSTANCE.get(mContext)
                 .addUserEventListener(mModel::onUserEvent);
diff --git a/src/com/android/launcher3/pm/UserCache.java b/src/com/android/launcher3/pm/UserCache.java
index ed25186..cf03462 100644
--- a/src/com/android/launcher3/pm/UserCache.java
+++ b/src/com/android/launcher3/pm/UserCache.java
@@ -93,12 +93,12 @@
 
     @Override
     public void close() {
-        MODEL_EXECUTOR.execute(() -> mUserChangeReceiver.unregisterReceiverSafely(mContext));
+        MODEL_EXECUTOR.execute(() -> mUserChangeReceiver.unregisterReceiverSafelySync(mContext));
     }
 
     @WorkerThread
     private void initAsync() {
-        mUserChangeReceiver.register(mContext,
+        mUserChangeReceiver.registerSync(mContext,
                 Intent.ACTION_MANAGED_PROFILE_AVAILABLE,
                 Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE,
                 Intent.ACTION_MANAGED_PROFILE_REMOVED,
diff --git a/src/com/android/launcher3/util/DisplayController.java b/src/com/android/launcher3/util/DisplayController.java
index 7f36d6f..3dcc663 100644
--- a/src/com/android/launcher3/util/DisplayController.java
+++ b/src/com/android/launcher3/util/DisplayController.java
@@ -132,11 +132,11 @@
             mWindowContext.registerComponentCallbacks(this);
         } else {
             mWindowContext = null;
-            mReceiver.register(mContext, ACTION_CONFIGURATION_CHANGED);
+            mReceiver.registerAsync(mContext, ACTION_CONFIGURATION_CHANGED);
         }
 
         // Initialize navigation mode change listener
-        mReceiver.registerPkgActions(mContext, TARGET_OVERLAY_PACKAGE, ACTION_OVERLAY_CHANGED);
+        mReceiver.registerPkgActionsAsync(mContext, TARGET_OVERLAY_PACKAGE, ACTION_OVERLAY_CHANGED);
 
         WindowManagerProxy wmProxy = WindowManagerProxy.INSTANCE.get(context);
         Context displayInfoContext = getDisplayInfoContext(display);
@@ -223,6 +223,7 @@
         } else {
             // TODO: unregister broadcast receiver
         }
+        mReceiver.unregisterReceiverSafelyAsync(mContext);
     }
 
     /**
diff --git a/src/com/android/launcher3/util/LockedUserState.kt b/src/com/android/launcher3/util/LockedUserState.kt
index 94f9e4f..2737249 100644
--- a/src/com/android/launcher3/util/LockedUserState.kt
+++ b/src/com/android/launcher3/util/LockedUserState.kt
@@ -25,6 +25,7 @@
     val isUserUnlockedAtLauncherStartup: Boolean
     var isUserUnlocked: Boolean
         private set
+
     private val mUserUnlockedActions: RunnableList = RunnableList()
 
     @VisibleForTesting
@@ -50,22 +51,18 @@
         if (isUserUnlocked) {
             notifyUserUnlocked()
         } else {
-            mUserUnlockedReceiver.register(mContext, Intent.ACTION_USER_UNLOCKED)
+            mUserUnlockedReceiver.registerAsync(mContext, Intent.ACTION_USER_UNLOCKED)
         }
     }
 
     private fun notifyUserUnlocked() {
         mUserUnlockedActions.executeAllAndDestroy()
-        Executors.THREAD_POOL_EXECUTOR.execute {
-            mUserUnlockedReceiver.unregisterReceiverSafely(mContext)
-        }
+        mUserUnlockedReceiver.unregisterReceiverSafelyAsync(mContext)
     }
 
     /** Stops the receiver from listening for ACTION_USER_UNLOCK broadcasts. */
     override fun close() {
-        Executors.THREAD_POOL_EXECUTOR.execute {
-            mUserUnlockedReceiver.unregisterReceiverSafely(mContext)
-        }
+        mUserUnlockedReceiver.unregisterReceiverSafelyAsync(mContext)
     }
 
     /**
diff --git a/src/com/android/launcher3/util/ScreenOnTracker.java b/src/com/android/launcher3/util/ScreenOnTracker.java
index e16e477..c1d192c 100644
--- a/src/com/android/launcher3/util/ScreenOnTracker.java
+++ b/src/com/android/launcher3/util/ScreenOnTracker.java
@@ -42,12 +42,12 @@
         // Assume that the screen is on to begin with
         mContext = context;
         mIsScreenOn = true;
-        mReceiver.register(context, ACTION_SCREEN_ON, ACTION_SCREEN_OFF, ACTION_USER_PRESENT);
+        mReceiver.registerAsync(context, ACTION_SCREEN_ON, ACTION_SCREEN_OFF, ACTION_USER_PRESENT);
     }
 
     @Override
     public void close() {
-        mReceiver.unregisterReceiverSafely(mContext);
+        mReceiver.unregisterReceiverSafelyAsync(mContext);
     }
 
     private void onReceive(Intent intent) {
diff --git a/src/com/android/launcher3/util/SimpleBroadcastReceiver.java b/src/com/android/launcher3/util/SimpleBroadcastReceiver.java
index 064bcd0..5f39cce 100644
--- a/src/com/android/launcher3/util/SimpleBroadcastReceiver.java
+++ b/src/com/android/launcher3/util/SimpleBroadcastReceiver.java
@@ -15,14 +15,21 @@
  */
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
+
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.os.Looper;
 import android.os.PatternMatcher;
 import android.text.TextUtils;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
+import androidx.annotation.WorkerThread;
+
+import com.android.launcher3.BuildConfig;
 
 import java.util.function.Consumer;
 
@@ -39,21 +46,63 @@
         mIntentConsumer.accept(intent);
     }
 
-    /**
-     * Helper method to register multiple actions
-     */
-    public void register(Context context, String... actions) {
+    /** Helper method to register multiple actions. Caller should be on main thread. */
+    @UiThread
+    public void registerAsync(Context context, String... actions) {
+        assertOnMainThread();
+        UI_HELPER_EXECUTOR.execute(() -> registerSync(context, actions));
+    }
+
+    /** Helper method to register multiple actions. Caller should be on main thread. */
+    @WorkerThread
+    public void registerSync(Context context, String... actions) {
+        assertOnBgThread();
         context.registerReceiver(this, getFilter(actions));
     }
 
     /**
-     * Helper method to register multiple actions associated with a paction
+     * Helper method to register multiple actions associated with a action. Caller should be from
+     * main thread.
      */
-    public void registerPkgActions(Context context, @Nullable String pkg, String... actions) {
+    @UiThread
+    public void registerPkgActionsAsync(Context context, @Nullable String pkg, String... actions) {
+        assertOnMainThread();
+        UI_HELPER_EXECUTOR.execute(() -> registerPkgActionsSync(context, pkg, actions));
+    }
+
+    /**
+     * Helper method to register multiple actions associated with a action. Caller should be from
+     * bg thread.
+     */
+    @WorkerThread
+    public void registerPkgActionsSync(Context context, @Nullable String pkg, String... actions) {
+        assertOnBgThread();
         context.registerReceiver(this, getPackageFilter(pkg, actions));
     }
 
     /**
+     * Unregisters the receiver ignoring any errors on bg thread. Caller should be on main thread.
+     */
+    @UiThread
+    public void unregisterReceiverSafelyAsync(Context context) {
+        assertOnMainThread();
+        UI_HELPER_EXECUTOR.execute(() -> unregisterReceiverSafelySync(context));
+    }
+
+    /**
+     * Unregisters the receiver ignoring any errors on bg thread. Caller should be on bg thread.
+     */
+    @WorkerThread
+    public void unregisterReceiverSafelySync(Context context) {
+        assertOnBgThread();
+        try {
+            context.unregisterReceiver(this);
+        } catch (IllegalArgumentException e) {
+            // It was probably never registered or already unregistered. Ignore.
+        }
+    }
+
+    /**
      * Creates an intent filter to listen for actions with a specific package in the data field.
      */
     public static IntentFilter getPackageFilter(String pkg, String... actions) {
@@ -73,14 +122,19 @@
         return filter;
     }
 
-    /**
-     * Unregisters the receiver ignoring any errors
-     */
-    public void unregisterReceiverSafely(Context context) {
-        try {
-            context.unregisterReceiver(this);
-        } catch (IllegalArgumentException e) {
-            // It was probably never registered or already unregistered. Ignore.
+    private static void assertOnBgThread() {
+        if (BuildConfig.IS_STUDIO_BUILD && isMainThread()) {
+            throw new IllegalStateException("Should not be called from main thread!");
         }
     }
+
+    private static void assertOnMainThread() {
+        if (BuildConfig.IS_STUDIO_BUILD && !isMainThread()) {
+            throw new IllegalStateException("Should not be called from bg thread!");
+        }
+    }
+
+    private static boolean isMainThread() {
+        return Thread.currentThread() == Looper.getMainLooper().getThread();
+    }
 }
diff --git a/src/com/android/launcher3/util/WallpaperOffsetInterpolator.java b/src/com/android/launcher3/util/WallpaperOffsetInterpolator.java
index b97b889..a2277a0 100644
--- a/src/com/android/launcher3/util/WallpaperOffsetInterpolator.java
+++ b/src/com/android/launcher3/util/WallpaperOffsetInterpolator.java
@@ -198,10 +198,11 @@
     public void setWindowToken(IBinder token) {
         mWindowToken = token;
         if (mWindowToken == null && mRegistered) {
-            mWallpaperChangeReceiver.unregisterReceiverSafely(mWorkspace.getContext());
+            mWallpaperChangeReceiver.unregisterReceiverSafelyAsync(mWorkspace.getContext());
             mRegistered = false;
         } else if (mWindowToken != null && !mRegistered) {
-            mWallpaperChangeReceiver.register(mWorkspace.getContext(), ACTION_WALLPAPER_CHANGED);
+            mWallpaperChangeReceiver.registerAsync(
+                    mWorkspace.getContext(), ACTION_WALLPAPER_CHANGED);
             onWallpaperChanged();
             mRegistered = true;
         }
diff --git a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
index a6f4441..6e01f9e 100644
--- a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
+++ b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
@@ -239,7 +239,8 @@
         final CountDownLatch count = new CountDownLatch(2);
         final SimpleBroadcastReceiver broadcastReceiver =
                 new SimpleBroadcastReceiver(i -> count.countDown());
-        broadcastReceiver.registerPkgActions(mTargetContext, pkg,
+        // We OK to make binder calls on main thread in test.
+        broadcastReceiver.registerPkgActionsSync(mTargetContext, pkg,
                 Intent.ACTION_PACKAGE_RESTARTED, Intent.ACTION_PACKAGE_DATA_CLEARED);
 
         mDevice.executeShellCommand("pm clear " + pkg);