diff --git a/core/api/current.txt b/core/api/current.txt
index cf3938a..77a6fec 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -31081,6 +31081,7 @@
     field public static final int S_V2 = 32; // 0x20
     field public static final int TIRAMISU = 33; // 0x21
     field public static final int UPSIDE_DOWN_CAKE = 10000; // 0x2710
+    field public static final int VANILLA_ICE_CREAM = 10000; // 0x2710
   }
 
   public final class Bundle extends android.os.BaseBundle implements java.lang.Cloneable android.os.Parcelable {
diff --git a/core/api/module-lib-current.txt b/core/api/module-lib-current.txt
index c6c4daf..13a4899 100644
--- a/core/api/module-lib-current.txt
+++ b/core/api/module-lib-current.txt
@@ -17,10 +17,19 @@
 
   public class ActivityManager {
     method @RequiresPermission(android.Manifest.permission.SET_ACTIVITY_WATCHER) public void addHomeVisibilityListener(@NonNull java.util.concurrent.Executor, @NonNull android.app.HomeVisibilityListener);
+    method @NonNull @RequiresPermission(android.Manifest.permission.PACKAGE_USAGE_STATS) public int[] getUidFrozenState(@NonNull int[]);
+    method @RequiresPermission(android.Manifest.permission.PACKAGE_USAGE_STATS) public void registerUidFrozenStateChangedCallback(@NonNull java.util.concurrent.Executor, @NonNull android.app.ActivityManager.UidFrozenStateChangedCallback);
     method @RequiresPermission(android.Manifest.permission.SET_ACTIVITY_WATCHER) public void removeHomeVisibilityListener(@NonNull android.app.HomeVisibilityListener);
+    method @RequiresPermission(android.Manifest.permission.PACKAGE_USAGE_STATS) public void unregisterUidFrozenStateChangedCallback(@NonNull android.app.ActivityManager.UidFrozenStateChangedCallback);
     method @RequiresPermission(android.Manifest.permission.CHANGE_CONFIGURATION) public boolean updateMccMncConfiguration(@NonNull String, @NonNull String);
   }
 
+  public static interface ActivityManager.UidFrozenStateChangedCallback {
+    method public void onUidFrozenStateChanged(@NonNull int[], @NonNull int[]);
+    field public static final int UID_FROZEN_STATE_FROZEN = 1; // 0x1
+    field public static final int UID_FROZEN_STATE_UNFROZEN = 2; // 0x2
+  }
+
   public class AppOpsManager {
     field public static final String OPSTR_NO_ISOLATED_STORAGE = "android:no_isolated_storage";
   }
diff --git a/core/api/test-current.txt b/core/api/test-current.txt
index 6a5ef3a..08ff534 100644
--- a/core/api/test-current.txt
+++ b/core/api/test-current.txt
@@ -122,16 +122,19 @@
     method @RequiresPermission(android.Manifest.permission.SET_ACTIVITY_WATCHER) public void addHomeVisibilityListener(@NonNull java.util.concurrent.Executor, @NonNull android.app.HomeVisibilityListener);
     method public void alwaysShowUnsupportedCompileSdkWarning(android.content.ComponentName);
     method public long getTotalRam();
+    method @NonNull @RequiresPermission(android.Manifest.permission.PACKAGE_USAGE_STATS) public int[] getUidFrozenState(@NonNull int[]);
     method @RequiresPermission(allOf={android.Manifest.permission.PACKAGE_USAGE_STATS, android.Manifest.permission.INTERACT_ACROSS_USERS_FULL}, conditional=true) public int getUidProcessCapabilities(int);
     method @RequiresPermission(allOf={android.Manifest.permission.PACKAGE_USAGE_STATS, android.Manifest.permission.INTERACT_ACROSS_USERS_FULL}, conditional=true) public int getUidProcessState(int);
     method public void holdLock(android.os.IBinder, int);
     method public static boolean isHighEndGfx();
+    method @RequiresPermission(android.Manifest.permission.PACKAGE_USAGE_STATS) public void registerUidFrozenStateChangedCallback(@NonNull java.util.concurrent.Executor, @NonNull android.app.ActivityManager.UidFrozenStateChangedCallback);
     method @RequiresPermission(android.Manifest.permission.SET_ACTIVITY_WATCHER) public void removeHomeVisibilityListener(@NonNull android.app.HomeVisibilityListener);
     method @RequiresPermission(android.Manifest.permission.RESET_APP_ERRORS) public void resetAppErrors();
     method public static void resumeAppSwitches() throws android.os.RemoteException;
     method @RequiresPermission(android.Manifest.permission.CHANGE_CONFIGURATION) public void scheduleApplicationInfoChanged(java.util.List<java.lang.String>, int);
     method @RequiresPermission(anyOf={android.Manifest.permission.MANAGE_USERS, android.Manifest.permission.INTERACT_ACROSS_USERS}) public void setStopUserOnSwitch(int);
     method @RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS_FULL) public boolean stopUser(int, boolean);
+    method @RequiresPermission(android.Manifest.permission.PACKAGE_USAGE_STATS) public void unregisterUidFrozenStateChangedCallback(@NonNull android.app.ActivityManager.UidFrozenStateChangedCallback);
     method @RequiresPermission(android.Manifest.permission.CHANGE_CONFIGURATION) public boolean updateMccMncConfiguration(@NonNull String, @NonNull String);
     method @RequiresPermission(android.Manifest.permission.DUMP) public void waitForBroadcastIdle();
     field public static final long LOCK_DOWN_CLOSE_SYSTEM_DIALOGS = 174664365L; // 0xa692aadL
@@ -161,6 +164,12 @@
     method @Nullable public String getIconResourcePackage();
   }
 
+  public static interface ActivityManager.UidFrozenStateChangedCallback {
+    method public void onUidFrozenStateChanged(@NonNull int[], @NonNull int[]);
+    field public static final int UID_FROZEN_STATE_FROZEN = 1; // 0x1
+    field public static final int UID_FROZEN_STATE_UNFROZEN = 2; // 0x2
+  }
+
   public class ActivityOptions {
     method public boolean isEligibleForLegacyPermissionPrompt();
     method @NonNull public static android.app.ActivityOptions makeCustomAnimation(@NonNull android.content.Context, int, int, int, @Nullable android.os.Handler, @Nullable android.app.ActivityOptions.OnAnimationStartedListener, @Nullable android.app.ActivityOptions.OnAnimationFinishedListener);
diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index d328b34..9328664 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -231,6 +231,114 @@
     final ArrayMap<OnUidImportanceListener, UidObserver> mImportanceListeners = new ArrayMap<>();
 
     /**
+     * Callback object for {@link #registerUidFrozenStateChangedCallback}
+     *
+     * @hide
+     */
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+    @TestApi
+    public interface UidFrozenStateChangedCallback {
+        /**
+         * Indicates that the UID was frozen.
+         *
+         * @hide
+         */
+        @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+        @TestApi
+        int UID_FROZEN_STATE_FROZEN = 1;
+
+        /**
+         * Indicates that the UID was unfrozen.
+         *
+         * @hide
+         */
+        @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+        @TestApi
+        int UID_FROZEN_STATE_UNFROZEN = 2;
+
+        /**
+         * @hide
+         */
+        @Retention(RetentionPolicy.SOURCE)
+        @IntDef(flag = false, prefix = {"UID_FROZEN_STATE_"}, value = {
+                UID_FROZEN_STATE_FROZEN,
+                UID_FROZEN_STATE_UNFROZEN,
+        })
+        public @interface UidFrozenState {}
+
+        /**
+         * Notify the client that the frozen states of an array of UIDs have changed.
+         *
+         * @param uids The UIDs for which the frozen state has changed
+         * @param frozenStates Frozen state for each UID index, Will be set to
+         *               {@link UidFrozenStateChangedCallback#UID_FROZEN_STATE_FROZEN}
+         *               when the UID is frozen. When the UID is unfrozen,
+         *               {@link UidFrozenStateChangedCallback#UID_FROZEN_STATE_UNFROZEN}
+         *               will be set.
+         *
+         * @hide
+         */
+        @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+        @TestApi
+        void onUidFrozenStateChanged(@NonNull int[] uids,
+                @NonNull @UidFrozenState int[] frozenStates);
+    }
+
+    /**
+     * Register a {@link UidFrozenStateChangedCallback} object to receive notification
+     * when a UID is frozen or unfrozen. Will throw an exception if the same
+     * callback object is registered more than once.
+     *
+     * @param executor The executor that the callback will be run from.
+     * @param callback The callback to be registered. Callbacks for previous frozen/unfrozen
+     *                 UID changes will not be delivered. Only changes in state from the point of
+     *                 registration onward will be reported.
+     * @throws IllegalStateException if the {@code callback} is already registered.
+     *
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.PACKAGE_USAGE_STATS)
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+    @TestApi
+    public void registerUidFrozenStateChangedCallback(
+            @NonNull Executor executor,
+            @NonNull UidFrozenStateChangedCallback callback) {
+    }
+
+    /**
+     * Unregister a {@link UidFrozenStateChangedCallback} callback.
+     * @param callback The callback to be unregistered.
+     *
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.PACKAGE_USAGE_STATS)
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+    @TestApi
+    public void unregisterUidFrozenStateChangedCallback(
+            @NonNull UidFrozenStateChangedCallback callback) {
+    }
+
+    /**
+     * Query the frozen state of a list of UIDs.
+     *
+     * @param uids the array of UIDs which the client would like to know the frozen state of.
+     * @return An array containing the frozen state for each requested UID, by index. Will be set
+     *               to {@link UidFrozenStateChangedCallback#UID_FROZEN_STATE_FROZEN}
+     *               if the UID is frozen. If the UID is not frozen or not found,
+     *               {@link UidFrozenStateChangedCallback#UID_FROZEN_STATE_UNFROZEN}
+     *               will be set.
+     *
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.PACKAGE_USAGE_STATS)
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+    @TestApi
+    public @NonNull @UidFrozenStateChangedCallback.UidFrozenState
+            int[] getUidFrozenState(@NonNull int[] uids) {
+        return new int[uids.length];
+    }
+
+    /**
      * <a href="{@docRoot}guide/topics/manifest/meta-data-element.html">{@code
      * <meta-data>}</a> name for a 'home' Activity that declares a package that is to be
      * uninstalled in lieu of the declaring one.  The package named here must be
diff --git a/core/java/android/os/Build.java b/core/java/android/os/Build.java
index 244632a..2e05b8d 100755
--- a/core/java/android/os/Build.java
+++ b/core/java/android/os/Build.java
@@ -1223,6 +1223,11 @@
          * Upside Down Cake.
          */
         public static final int UPSIDE_DOWN_CAKE = CUR_DEVELOPMENT;
+
+        /**
+         * Vanilla Ice Cream.
+         */
+        public static final int VANILLA_ICE_CREAM = CUR_DEVELOPMENT;
     }
 
     /** The type of build, like "user" or "eng". */
diff --git a/media/java/android/media/audiopolicy/AudioMix.java b/media/java/android/media/audiopolicy/AudioMix.java
index f85bdee..094a33f 100644
--- a/media/java/android/media/audiopolicy/AudioMix.java
+++ b/media/java/android/media/audiopolicy/AudioMix.java
@@ -25,6 +25,8 @@
 import android.media.AudioSystem;
 import android.os.Build;
 
+import com.android.internal.annotations.VisibleForTesting;
+
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.Objects;
@@ -252,10 +254,10 @@
         if (o == null || getClass() != o.getClass()) return false;
 
         final AudioMix that = (AudioMix) o;
-        return (this.mRouteFlags == that.mRouteFlags)
-                && (this.mRule == that.mRule)
-                && (this.mMixType == that.mMixType)
-                && (this.mFormat == that.mFormat);
+        return Objects.equals(this.mRouteFlags, that.mRouteFlags)
+            && Objects.equals(this.mRule, that.mRule)
+            && Objects.equals(this.mMixType, that.mMixType)
+            && Objects.equals(this.mFormat, that.mFormat);
     }
 
     /** @hide */
@@ -340,7 +342,8 @@
          * @param address
          * @return the same Builder instance.
          */
-        Builder setDevice(int deviceType, String address) {
+        @VisibleForTesting
+        public Builder setDevice(int deviceType, String address) {
             mDeviceSystemType = deviceType;
             mDeviceAddress = address;
             return this;
diff --git a/media/java/android/media/musicrecognition/OWNERS b/media/java/android/media/musicrecognition/OWNERS
index 58f5d40..037b048 100644
--- a/media/java/android/media/musicrecognition/OWNERS
+++ b/media/java/android/media/musicrecognition/OWNERS
@@ -1,6 +1,5 @@
 # Bug component: 830636
 
-joannechung@google.com
 oni@google.com
 volnov@google.com
 
diff --git a/packages/SystemUI/OWNERS b/packages/SystemUI/OWNERS
index 402d73c..811b409 100644
--- a/packages/SystemUI/OWNERS
+++ b/packages/SystemUI/OWNERS
@@ -55,6 +55,7 @@
 madym@google.com
 mankoff@google.com
 mateuszc@google.com
+mgalhardo@google.com
 michaelmikhil@google.com
 michschn@google.com
 mkephart@google.com
diff --git a/services/musicrecognition/OWNERS b/services/musicrecognition/OWNERS
index 58f5d40..037b048 100644
--- a/services/musicrecognition/OWNERS
+++ b/services/musicrecognition/OWNERS
@@ -1,6 +1,5 @@
 # Bug component: 830636
 
-joannechung@google.com
 oni@google.com
 volnov@google.com
 
diff --git a/tools/aapt2/SdkConstants.cpp b/tools/aapt2/SdkConstants.cpp
index 34e8edb..e7b3770 100644
--- a/tools/aapt2/SdkConstants.cpp
+++ b/tools/aapt2/SdkConstants.cpp
@@ -26,8 +26,8 @@
 namespace aapt {
 
 static ApiVersion sDevelopmentSdkLevel = 10000;
-static const auto sDevelopmentSdkCodeNames =
-    std::unordered_set<StringPiece>({"Q", "R", "S", "Sv2", "Tiramisu", "UpsideDownCake"});
+static const auto sDevelopmentSdkCodeNames = std::unordered_set<StringPiece>(
+    {"Q", "R", "S", "Sv2", "Tiramisu", "UpsideDownCake", "VanillaIceCream"});
 
 static const std::vector<std::pair<uint16_t, ApiVersion>> sAttrIdMap = {
     {0x021c, 1},