diff --git a/api/Android.bp b/api/Android.bp
index 533f9f6..3f2316f 100644
--- a/api/Android.bp
+++ b/api/Android.bp
@@ -102,6 +102,11 @@
             "framework-crashrecovery",
         ],
         default: [],
+    }) + select(release_flag("RELEASE_RANGING_STACK"), {
+        true: [
+            "framework-ranging",
+        ],
+        default: [],
     }),
     system_server_classpath: [
         "service-art",
diff --git a/api/StubLibraries.bp b/api/StubLibraries.bp
index b3a674f..d1aa23c 100644
--- a/api/StubLibraries.bp
+++ b/api/StubLibraries.bp
@@ -466,6 +466,32 @@
 }
 
 java_library {
+    name: "android-non-updatable.stubs.system_server",
+    defaults: ["android-non-updatable_defaults"],
+    static_libs: [
+        "android-non-updatable.stubs.system_server.from-source",
+    ],
+    product_variables: {
+        build_from_text_stub: {
+            static_libs: [
+                "android-non-updatable.stubs.system_server.from-text",
+            ],
+            exclude_static_libs: [
+                "android-non-updatable.stubs.system_server.from-source",
+            ],
+        },
+    },
+}
+
+java_library {
+    name: "android-non-updatable.stubs.exportable.system_server",
+    defaults: ["android-non-updatable_defaults"],
+    static_libs: [
+        "android-non-updatable.stubs.exportable.system_server.from-source",
+    ],
+}
+
+java_library {
     name: "android-non-updatable.stubs.from-source",
     defaults: [
         "android-non-updatable_defaults",
@@ -561,6 +587,30 @@
     },
 }
 
+java_library {
+    name: "android-non-updatable.stubs.system_server.from-source",
+    defaults: [
+        "android-non-updatable_defaults",
+        "android-non-updatable_from_source_defaults",
+    ],
+    srcs: [":services-non-updatable-stubs"],
+    libs: non_updatable_api_deps_on_modules,
+}
+
+java_library {
+    name: "android-non-updatable.stubs.exportable.system_server.from-source",
+    defaults: [
+        "android-non-updatable_defaults",
+        "android-non-updatable_from_source_defaults",
+        "android-non-updatable_exportable_from_source_defaults",
+    ],
+    srcs: [":services-non-updatable-stubs{.exportable}"],
+    libs: non_updatable_api_deps_on_modules,
+    dist: {
+        dir: "apistubs/android/system-server",
+    },
+}
+
 java_defaults {
     name: "android-non-updatable_from_text_defaults",
     defaults: ["android-non-updatable-stubs-libs-defaults"],
@@ -662,6 +712,25 @@
     libs: ["all-modules-system-stubs"],
 }
 
+java_api_library {
+    name: "android-non-updatable.stubs.system_server.from-text",
+    api_surface: "system_server",
+    api_contributions: [
+        "api-stubs-docs-non-updatable.api.contribution",
+        "system-api-stubs-docs-non-updatable.api.contribution",
+        "module-lib-api-stubs-docs-non-updatable.api.contribution",
+        "services-non-updatable-stubs.api.contribution",
+    ],
+    defaults: [
+        "module-classpath-java-defaults",
+        "android-non-updatable_everything_from_text_defaults",
+    ],
+
+    // Use full Android API not just the non-updatable API as the latter is incomplete
+    // and can result in incorrect behavior.
+    previous_api: ":android.api.combined.system-server.latest",
+}
+
 java_defaults {
     name: "android_stubs_dists_default",
     dist: {
@@ -813,9 +882,9 @@
     defaults: [
         "android.jar_defaults",
     ],
-    srcs: [":services-non-updatable-stubs"],
     installable: false,
     static_libs: [
+        "android-non-updatable.stubs.system_server",
         "android_module_lib_stubs_current",
     ],
     visibility: ["//frameworks/base/services"],
@@ -827,9 +896,9 @@
         "android.jar_defaults",
         "android_stubs_dists_default",
     ],
-    srcs: [":services-non-updatable-stubs{.exportable}"],
     installable: false,
     static_libs: [
+        "android-non-updatable.stubs.exportable.system_server",
         "android_module_lib_stubs_current_exportable",
     ],
     dist: {
diff --git a/core/api/current.txt b/core/api/current.txt
index 3d42a04..9881a90 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -32570,6 +32570,13 @@
     method public boolean isCharging();
     field public static final String ACTION_CHARGING = "android.os.action.CHARGING";
     field public static final String ACTION_DISCHARGING = "android.os.action.DISCHARGING";
+    field @FlaggedApi("android.os.battery_part_status_api") public static final int BATTERY_CAPACITY_LEVEL_CRITICAL = 1; // 0x1
+    field @FlaggedApi("android.os.battery_part_status_api") public static final int BATTERY_CAPACITY_LEVEL_FULL = 5; // 0x5
+    field @FlaggedApi("android.os.battery_part_status_api") public static final int BATTERY_CAPACITY_LEVEL_HIGH = 4; // 0x4
+    field @FlaggedApi("android.os.battery_part_status_api") public static final int BATTERY_CAPACITY_LEVEL_LOW = 2; // 0x2
+    field @FlaggedApi("android.os.battery_part_status_api") public static final int BATTERY_CAPACITY_LEVEL_NORMAL = 3; // 0x3
+    field @FlaggedApi("android.os.battery_part_status_api") public static final int BATTERY_CAPACITY_LEVEL_UNKNOWN = 0; // 0x0
+    field @FlaggedApi("android.os.battery_part_status_api") public static final int BATTERY_CAPACITY_LEVEL_UNSUPPORTED = -1; // 0xffffffff
     field public static final int BATTERY_HEALTH_COLD = 7; // 0x7
     field public static final int BATTERY_HEALTH_DEAD = 4; // 0x4
     field public static final int BATTERY_HEALTH_GOOD = 2; // 0x2
@@ -32594,6 +32601,7 @@
     field public static final int BATTERY_STATUS_NOT_CHARGING = 4; // 0x4
     field public static final int BATTERY_STATUS_UNKNOWN = 1; // 0x1
     field public static final String EXTRA_BATTERY_LOW = "battery_low";
+    field @FlaggedApi("android.os.battery_part_status_api") public static final String EXTRA_CAPACITY_LEVEL = "android.os.extra.CAPACITY_LEVEL";
     field public static final String EXTRA_CHARGING_STATUS = "android.os.extra.CHARGING_STATUS";
     field public static final String EXTRA_CYCLE_COUNT = "android.os.extra.CYCLE_COUNT";
     field public static final String EXTRA_HEALTH = "health";
diff --git a/core/java/android/os/BatteryManager.java b/core/java/android/os/BatteryManager.java
index f3efd89..8b267bf 100644
--- a/core/java/android/os/BatteryManager.java
+++ b/core/java/android/os/BatteryManager.java
@@ -141,6 +141,7 @@
     /**
      * Extra for {@link android.content.Intent#ACTION_BATTERY_CHANGED}:
      * integer containing the charge counter present in the battery.
+     * It shows the available battery power in µAh
      * {@hide}
      */
      @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
@@ -166,6 +167,76 @@
     public static final String EXTRA_CHARGING_STATUS = "android.os.extra.CHARGING_STATUS";
 
     /**
+     * Extra for {@link android.content.Intent#ACTION_BATTERY_CHANGED}:
+     * Int value representing the battery's capacity level. These constants are key indicators of
+     * battery status and system capabilities, guiding power management decisions for both the
+     * system and apps:
+     * {@link #BATTERY_CAPACITY_LEVEL_UNSUPPORTED}: Feature not supported on this device.
+     * {@link #BATTERY_CAPACITY_LEVEL_UNKNOWN}: Battery status is unavailable or uninitialized.
+     * {@link #BATTERY_CAPACITY_LEVEL_CRITICAL}: Battery is critically low and the Android
+     * framework has been notified to schedule a shutdown by this value
+     * {@link #BATTERY_CAPACITY_LEVEL_LOW}: Android framework must limit background jobs to
+     * avoid impacting charging speed
+     * {@link #BATTERY_CAPACITY_LEVEL_NORMAL}: Battery level and charging rates are normal,
+     * battery temperature is within normal range and adapter power is enough to charge the
+     * battery at an acceptable rate. Android framework can run light background tasks without
+     * affecting charging performance severely.
+     * {@link #BATTERY_CAPACITY_LEVEL_HIGH}: Battery level is high, battery temperature is
+     * within normal range and adapter power is enough to charge the battery at an acceptable
+     * rate while running background loads. Android framework can run background tasks without
+     * affecting charging or battery performance.
+     * {@link #BATTERY_CAPACITY_LEVEL_FULL}: The battery is full, battery temperature is
+     * within normal range and adapter power is enough to sustain running background loads.
+     * Android framework can run background tasks without affecting the battery level or
+     * battery performance.
+     */
+
+    @FlaggedApi(FLAG_BATTERY_PART_STATUS_API)
+    public static final String EXTRA_CAPACITY_LEVEL = "android.os.extra.CAPACITY_LEVEL";
+
+    /**
+     * Battery capacity level is unsupported. @see EXTRA_CAPACITY_LEVEL
+     */
+    @FlaggedApi(FLAG_BATTERY_PART_STATUS_API)
+    public static final int BATTERY_CAPACITY_LEVEL_UNSUPPORTED = -1;
+
+    /**
+     * Battery capacity level is unknown. @see EXTRA_CAPACITY_LEVEL
+     */
+    @FlaggedApi(FLAG_BATTERY_PART_STATUS_API)
+    public static final int BATTERY_CAPACITY_LEVEL_UNKNOWN = 0;
+
+    /**
+     * Battery capacity level is critical. @see EXTRA_CAPACITY_LEVEL
+     */
+    @FlaggedApi(FLAG_BATTERY_PART_STATUS_API)
+    public static final int BATTERY_CAPACITY_LEVEL_CRITICAL = 1;
+
+    /**
+     * Battery capacity level is low. @see EXTRA_CAPACITY_LEVEL
+     */
+    @FlaggedApi(FLAG_BATTERY_PART_STATUS_API)
+    public static final int BATTERY_CAPACITY_LEVEL_LOW = 2;
+
+    /**
+     * Battery capacity level is normal. @see EXTRA_CAPACITY_LEVEL
+     */
+    @FlaggedApi(FLAG_BATTERY_PART_STATUS_API)
+    public static final int BATTERY_CAPACITY_LEVEL_NORMAL = 3;
+
+    /**
+     * Battery capacity level is high. @see EXTRA_CAPACITY_LEVEL
+     */
+    @FlaggedApi(FLAG_BATTERY_PART_STATUS_API)
+    public static final int BATTERY_CAPACITY_LEVEL_HIGH = 4;
+
+    /**
+     * Battery capacity level is full. @see EXTRA_CAPACITY_LEVEL
+     */
+    @FlaggedApi(FLAG_BATTERY_PART_STATUS_API)
+    public static final int BATTERY_CAPACITY_LEVEL_FULL = 5;
+
+    /**
      * Extra for {@link android.content.Intent#ACTION_BATTERY_LEVEL_CHANGED}:
      * Contains list of Bundles representing battery events
      * @hide
diff --git a/services/core/java/com/android/server/BatteryService.java b/services/core/java/com/android/server/BatteryService.java
index 2de4482..8891d8e 100644
--- a/services/core/java/com/android/server/BatteryService.java
+++ b/services/core/java/com/android/server/BatteryService.java
@@ -158,6 +158,7 @@
     private int mLastChargeCounter;
     private int mLastBatteryCycleCount;
     private int mLastChargingState;
+    private int mLastBatteryCapacityLevel;
     /**
      * The last seen charging policy. This requires the
      * {@link android.Manifest.permission#BATTERY_STATS} permission and should therefore not be
@@ -555,7 +556,8 @@
                         || mHealthInfo.batteryChargeCounterUah != mLastChargeCounter
                         || mInvalidCharger != mLastInvalidCharger
                         || mHealthInfo.batteryCycleCount != mLastBatteryCycleCount
-                        || mHealthInfo.chargingState != mLastChargingState)) {
+                        || mHealthInfo.chargingState != mLastChargingState
+                        || mHealthInfo.batteryCapacityLevel != mLastBatteryCapacityLevel)) {
 
             if (mPlugType != mLastPlugType) {
                 if (mLastPlugType == BATTERY_PLUGGED_NONE) {
@@ -739,6 +741,7 @@
             mLastInvalidCharger = mInvalidCharger;
             mLastBatteryCycleCount = mHealthInfo.batteryCycleCount;
             mLastChargingState = mHealthInfo.chargingState;
+            mLastBatteryCapacityLevel = mHealthInfo.batteryCapacityLevel;
         }
     }
 
@@ -772,6 +775,7 @@
         intent.putExtra(BatteryManager.EXTRA_CHARGE_COUNTER, mHealthInfo.batteryChargeCounterUah);
         intent.putExtra(BatteryManager.EXTRA_CYCLE_COUNT, mHealthInfo.batteryCycleCount);
         intent.putExtra(BatteryManager.EXTRA_CHARGING_STATUS, mHealthInfo.chargingState);
+        intent.putExtra(BatteryManager.EXTRA_CAPACITY_LEVEL, mHealthInfo.batteryCapacityLevel);
         if (DEBUG) {
             Slog.d(TAG, "Sending ACTION_BATTERY_CHANGED. scale:" + BATTERY_SCALE
                     + ", info:" + mHealthInfo.toString());
@@ -817,6 +821,7 @@
         event.putLong(BatteryManager.EXTRA_EVENT_TIMESTAMP, now);
         event.putInt(BatteryManager.EXTRA_CYCLE_COUNT, mHealthInfo.batteryCycleCount);
         event.putInt(BatteryManager.EXTRA_CHARGING_STATUS, mHealthInfo.chargingState);
+        event.putInt(BatteryManager.EXTRA_CAPACITY_LEVEL, mHealthInfo.batteryCapacityLevel);
 
         boolean queueWasEmpty = mBatteryLevelsEventQueue.isEmpty();
         mBatteryLevelsEventQueue.add(event);
@@ -1254,6 +1259,7 @@
                 pw.println("  technology: " + mHealthInfo.batteryTechnology);
                 pw.println("  Charging state: " + mHealthInfo.chargingState);
                 pw.println("  Charging policy: " + mHealthInfo.chargingPolicy);
+                pw.println("  Capacity level: " + mHealthInfo.batteryCapacityLevel);
             } else {
                 Shell shell = new Shell();
                 shell.exec(mBinderService, null, fd, null, args, null, new ResultReceiver(null));
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 995c176..e0db1f6 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -749,12 +749,14 @@
     /**
      * Map userId to its companion app uids.
      */
+    @GuardedBy("mCompanionAppUidsMap")
     private final Map<Integer, Set<Integer>> mCompanionAppUidsMap = new ArrayMap<>();
 
     /**
      * The profile owner UIDs.
      */
-    private ArraySet<Integer> mProfileOwnerUids = null;
+    @GuardedBy("mProfileOwnerUids")
+    private final ArraySet<Integer> mProfileOwnerUids = new ArraySet<>();
 
     final UserController mUserController;
     @VisibleForTesting
@@ -19604,32 +19606,35 @@
 
         @Override
         public void setProfileOwnerUid(ArraySet<Integer> profileOwnerUids) {
-            synchronized (ActivityManagerService.this) {
-                mProfileOwnerUids = profileOwnerUids;
+            synchronized (mProfileOwnerUids) {
+                mProfileOwnerUids.clear();
+                mProfileOwnerUids.addAll(profileOwnerUids);
             }
         }
 
         @Override
         public boolean isProfileOwner(int uid) {
-            synchronized (ActivityManagerService.this) {
-                return mProfileOwnerUids != null && mProfileOwnerUids.indexOf(uid) >= 0;
+            synchronized (mProfileOwnerUids) {
+                return mProfileOwnerUids.indexOf(uid) >= 0;
             }
         }
 
         @Override
         public void setCompanionAppUids(int userId, Set<Integer> companionAppUids) {
-            synchronized (ActivityManagerService.this) {
+            synchronized (mCompanionAppUidsMap) {
                 mCompanionAppUidsMap.put(userId, companionAppUids);
             }
         }
 
         @Override
         public boolean isAssociatedCompanionApp(int userId, int uid) {
-            final Set<Integer> allUids = mCompanionAppUidsMap.get(userId);
-            if (allUids == null) {
-                return false;
+            synchronized (mCompanionAppUidsMap) {
+                final Set<Integer> allUids = mCompanionAppUidsMap.get(userId);
+                if (allUids == null) {
+                    return false;
+                }
+                return allUids.contains(uid);
             }
-            return allUids.contains(uid);
         }
 
         @Override