Merge changes I5f425928,I397d361f

* changes:
  Define stubs_defaults for the new API surfaces
  Add SystemApi params to framework-module defaults
diff --git a/Android.bp b/Android.bp
index b782fec..b69617b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -917,6 +917,7 @@
         "core/java/android/os/RemoteException.java",
         "core/java/android/util/AndroidException.java",
     ],
+    libs: [ "unsupportedappusage" ],
 
     dxflags: ["--core-library"],
     installable: false,
diff --git a/StubLibraries.bp b/StubLibraries.bp
index d195047..baa3c61 100644
--- a/StubLibraries.bp
+++ b/StubLibraries.bp
@@ -41,10 +41,9 @@
 ]
 
 stubs_defaults {
-    name: "metalava-api-stubs-default",
+    name: "metalava-non-updatable-api-stubs-default",
     srcs: [
         ":framework-non-updatable-sources",
-        ":framework-updatable-sources",
         "core/java/**/*.logtags",
         ":opt-telephony-srcs",
         ":opt-net-voip-srcs",
@@ -64,14 +63,23 @@
         "sdk-dir",
         "api-versions-jars-dir",
     ],
-    sdk_version: "core_platform",
     filter_packages: packages_to_document,
 }
 
+stubs_defaults {
+    name: "metalava-api-stubs-default",
+    defaults: ["metalava-non-updatable-api-stubs-default"],
+    srcs: [":framework-updatable-sources"],
+    sdk_version: "core_platform",
+}
+
 /////////////////////////////////////////////////////////////////////
 // *-api-stubs-docs modules providing source files for the stub libraries
 /////////////////////////////////////////////////////////////////////
 
+// api-stubs-docs, system-api-stubs-docs, and test-api-stubs-docs have APIs
+// from the non-updatable part of the platform as well as from the updatable
+// modules
 droidstubs {
     name: "api-stubs-docs",
     defaults: ["metalava-api-stubs-default"],
@@ -112,7 +120,10 @@
     arg_files: [
         "core/res/AndroidManifest.xml",
     ],
-    args: metalava_framework_docs_args + " --show-annotation android.annotation.SystemApi\\(client=android.annotation.SystemApi.Client.PRIVILEGED_APPS,process=android.annotation.SystemApi.Process.ALL\\)",
+    args: metalava_framework_docs_args +
+        " --show-annotation android.annotation.SystemApi\\(" +
+        "client=android.annotation.SystemApi.Client.PRIVILEGED_APPS," +
+        "process=android.annotation.SystemApi.Process.ALL\\)",
     check_api: {
         current: {
             api_file: "api/system-current.txt",
@@ -155,6 +166,111 @@
 }
 
 /////////////////////////////////////////////////////////////////////
+// Following droidstubs modules are for extra APIs for modules.
+// The framework currently have two more API surfaces for modules:
+// @SystemApi(client=MODULE_APPS) and @SystemApi(client=MODULE_LIBRARIES)
+/////////////////////////////////////////////////////////////////////
+
+// TODO(b/146727827) remove the *-api modules when we can teach metalava
+// about the relationship among the API surfaces. Currently, these modules are only to generate
+// the API signature files and ensure that the APIs evolve in a backwards compatible manner.
+// They however are NOT used for building the API stub.
+droidstubs {
+    name: "module-app-api",
+    defaults: ["metalava-non-updatable-api-stubs-default"],
+    libs: ["framework-all"],
+    arg_files: ["core/res/AndroidManifest.xml"],
+    args: metalava_framework_docs_args +
+        " --show-annotation android.annotation.SystemApi\\(" +
+        "client=android.annotation.SystemApi.Client.MODULE_APPS," +
+        "process=android.annotation.SystemApi.Process.ALL\\)",
+    check_api: {
+        current: {
+            api_file: "api/module-app-current.txt",
+            removed_api_file: "api/module-app-removed.txt",
+        },
+        // TODO(b/147559833) enable the compatibility check against the last release API
+        // and the API lint
+        //last_released: {
+        //    api_file: ":last-released-module-app-api",
+        //    removed_api_file: "api/module-app-removed.txt",
+        //    baseline_file: ":module-app-api-incompatibilities-with-last-released"
+        //},
+        //api_lint: {
+        //    enabled: true,
+        //    new_since: ":last-released-module-app-api",
+        //    baseline_file: "api/module-app-lint-baseline.txt",
+        //},
+    },
+    //jdiff_enabled: true,
+}
+
+droidstubs {
+    name: "module-lib-api",
+    defaults: ["metalava-non-updatable-api-stubs-default"],
+    libs: ["framework-all"],
+    arg_files: ["core/res/AndroidManifest.xml"],
+    args: metalava_framework_docs_args +
+        " --show-annotation android.annotation.SystemApi\\(" +
+        "client=android.annotation.SystemApi.Client.MODULE_LIBRARIES," +
+        "process=android.annotation.SystemApi.Process.ALL\\)",
+    check_api: {
+        current: {
+            api_file: "api/module-lib-current.txt",
+            removed_api_file: "api/module-lib-removed.txt",
+        },
+        // TODO(b/147559833) enable the compatibility check against the last release API
+        // and the API lint
+        //last_released: {
+        //    api_file: ":last-released-module-lib-api",
+        //    removed_api_file: "api/module-lib-removed.txt",
+        //    baseline_file: ":module-lib-api-incompatibilities-with-last-released"
+        //},
+        //api_lint: {
+        //    enabled: true,
+        //    new_since: ":last-released-module-lib-api",
+        //    baseline_file: "api/module-lib-lint-baseline.txt",
+        //},
+    },
+    //jdiff_enabled: true,
+}
+
+// The following two droidstubs modules generate source files for the API stub libraries for
+// modules. Note that they not only include their own APIs but also other APIs that have
+// narrower scope. For example, module-lib-api-stubs-docs includes all @SystemApis not just
+// the ones with 'client=MODULE_LIBRARIES'.
+droidstubs {
+    name: "module-app-api-stubs-docs",
+    defaults: ["metalava-non-updatable-api-stubs-default"],
+    libs: ["framework-all"],
+    arg_files: ["core/res/AndroidManifest.xml"],
+    args: metalava_framework_docs_args +
+        " --show-annotation android.annotation.SystemApi\\(" +
+        "client=android.annotation.SystemApi.Client.PRIVILEGED_APPS," +
+        "process=android.annotation.SystemApi.Process.ALL\\)" +
+        " --show-annotation android.annotation.SystemApi\\(" +
+        "client=android.annotation.SystemApi.Client.MODULE_APPS," +
+        "process=android.annotation.SystemApi.Process.ALL\\)",
+}
+
+droidstubs {
+    name: "module-lib-api-stubs-docs",
+    defaults: ["metalava-non-updatable-api-stubs-default"],
+    libs: ["framework-all"],
+    arg_files: ["core/res/AndroidManifest.xml"],
+    args: metalava_framework_docs_args +
+        " --show-annotation android.annotation.SystemApi\\(" +
+        "client=android.annotation.SystemApi.Client.PRIVILEGED_APPS," +
+        "process=android.annotation.SystemApi.Process.ALL\\)" +
+        " --show-annotation android.annotation.SystemApi\\(" +
+        "client=android.annotation.SystemApi.Client.MODULE_APPS," +
+        "process=android.annotation.SystemApi.Process.ALL\\)" +
+        " --show-annotation android.annotation.SystemApi\\(" +
+        "client=android.annotation.SystemApi.Client.MODULE_LIBRARIES," +
+        "process=android.annotation.SystemApi.Process.ALL\\)",
+}
+
+/////////////////////////////////////////////////////////////////////
 // android_*_stubs_current modules are the stubs libraries compiled
 // from *-api-stubs-docs
 /////////////////////////////////////////////////////////////////////
@@ -169,7 +285,6 @@
     java_resources: [
         ":notices-for-framework-stubs",
     ],
-    sdk_version: "core_current",
     system_modules: "none",
     java_version: "1.8",
     compile_dex: true,
@@ -187,6 +302,7 @@
         "private-stub-annotations-jar",
     ],
     defaults: ["framework-stubs-default"],
+    sdk_version: "core_current",
 }
 
 java_library_static {
@@ -201,6 +317,7 @@
         "private-stub-annotations-jar",
     ],
     defaults: ["framework-stubs-default"],
+    sdk_version: "core_current",
 }
 
 java_library_static {
@@ -215,6 +332,37 @@
         "private-stub-annotations-jar",
     ],
     defaults: ["framework-stubs-default"],
+    sdk_version: "core_current",
+}
+
+java_library_static {
+    name: "framework_module_app_stubs_current",
+    srcs: [
+        ":module-app-api-stubs-docs",
+    ],
+    libs: [
+        "stub-annotations",
+        "framework-all",
+    ],
+    static_libs: [
+        "private-stub-annotations-jar",
+    ],
+    defaults: ["framework-stubs-default"],
+}
+
+java_library_static {
+    name: "framework_module_lib_stubs_current",
+    srcs: [
+        ":module-lib-api-stubs-docs",
+    ],
+    libs: [
+        "stub-annotations",
+        "framework-all",
+    ],
+    static_libs: [
+        "private-stub-annotations-jar",
+    ],
+    defaults: ["framework-stubs-default"],
 }
 
 /////////////////////////////////////////////////////////////////////
diff --git a/api/module-app-current.txt b/api/module-app-current.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/api/module-app-current.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/api/module-app-removed.txt b/api/module-app-removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/api/module-app-removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/api/module-lib-current.txt b/api/module-lib-current.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/api/module-lib-current.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/api/module-lib-removed.txt b/api/module-lib-removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/api/module-lib-removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/api/system-current.txt b/api/system-current.txt
index 52a86c1..5fa6bbd 100755
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -1208,6 +1208,10 @@
     field public static final String SERVICE_INTERFACE = "android.app.usage.CacheQuotaService";
   }
 
+  public class NetworkStatsManager {
+    method @NonNull @RequiresPermission(android.Manifest.permission.UPDATE_DEVICE_STATS) public android.net.netstats.provider.NetworkStatsProviderCallback registerNetworkStatsProvider(@NonNull String, @NonNull android.net.netstats.provider.AbstractNetworkStatsProvider);
+  }
+
   public static final class UsageEvents.Event {
     method public int getInstanceId();
     method @Nullable public String getNotificationChannelId();
diff --git a/core/java/android/app/usage/NetworkStatsManager.java b/core/java/android/app/usage/NetworkStatsManager.java
index 7412970..9c4a8f4 100644
--- a/core/java/android/app/usage/NetworkStatsManager.java
+++ b/core/java/android/app/usage/NetworkStatsManager.java
@@ -16,9 +16,10 @@
 
 package android.app.usage;
 
-import static com.android.internal.util.Preconditions.checkNotNull;
-
+import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.annotation.RequiresPermission;
+import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
 import android.app.usage.NetworkStats.Bucket;
@@ -29,6 +30,9 @@
 import android.net.INetworkStatsService;
 import android.net.NetworkIdentity;
 import android.net.NetworkTemplate;
+import android.net.netstats.provider.AbstractNetworkStatsProvider;
+import android.net.netstats.provider.NetworkStatsProviderCallback;
+import android.net.netstats.provider.NetworkStatsProviderWrapper;
 import android.os.Binder;
 import android.os.Handler;
 import android.os.Looper;
@@ -42,6 +46,8 @@
 
 import com.android.internal.annotations.VisibleForTesting;
 
+import java.util.Objects;
+
 /**
  * Provides access to network usage history and statistics. Usage data is collected in
  * discrete bins of time called 'Buckets'. See {@link NetworkStats.Bucket} for details.
@@ -418,7 +424,7 @@
     /** @hide */
     public void registerUsageCallback(NetworkTemplate template, int networkType,
             long thresholdBytes, UsageCallback callback, @Nullable Handler handler) {
-        checkNotNull(callback, "UsageCallback cannot be null");
+        Objects.requireNonNull(callback, "UsageCallback cannot be null");
 
         final Looper looper;
         if (handler == null) {
@@ -519,6 +525,34 @@
         private DataUsageRequest request;
     }
 
+    /**
+     * Registers a custom provider of {@link android.net.NetworkStats} to combine the network
+     * statistics that cannot be seen by the kernel to system. To unregister, invoke
+     * {@link NetworkStatsProviderCallback#unregister()}.
+     *
+     * @param tag a human readable identifier of the custom network stats provider.
+     * @param provider a custom implementation of {@link AbstractNetworkStatsProvider} that needs to
+     *                 be registered to the system.
+     * @return a {@link NetworkStatsProviderCallback}, which can be used to report events to the
+     *         system.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(android.Manifest.permission.UPDATE_DEVICE_STATS)
+    @NonNull public NetworkStatsProviderCallback registerNetworkStatsProvider(
+            @NonNull String tag,
+            @NonNull AbstractNetworkStatsProvider provider) {
+        try {
+            final NetworkStatsProviderWrapper wrapper = new NetworkStatsProviderWrapper(provider);
+            return new NetworkStatsProviderCallback(
+                    mService.registerNetworkStatsProvider(tag, wrapper));
+        } catch (RemoteException e) {
+            e.rethrowAsRuntimeException();
+        }
+        // Unreachable code, but compiler doesn't know about it.
+        return null;
+    }
+
     private static NetworkTemplate createTemplate(int networkType, String subscriberId) {
         final NetworkTemplate template;
         switch (networkType) {
diff --git a/core/java/android/bluetooth/BluetoothA2dp.java b/core/java/android/bluetooth/BluetoothA2dp.java
index 64df0e8..d8c653c6 100644
--- a/core/java/android/bluetooth/BluetoothA2dp.java
+++ b/core/java/android/bluetooth/BluetoothA2dp.java
@@ -24,7 +24,7 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Binder;
 import android.os.Build;
diff --git a/core/java/android/bluetooth/BluetoothA2dpSink.java b/core/java/android/bluetooth/BluetoothA2dpSink.java
index c6957e1..8993de0 100755
--- a/core/java/android/bluetooth/BluetoothA2dpSink.java
+++ b/core/java/android/bluetooth/BluetoothA2dpSink.java
@@ -21,7 +21,7 @@
 import android.annotation.RequiresPermission;
 import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Binder;
 import android.os.IBinder;
diff --git a/core/java/android/bluetooth/BluetoothAdapter.java b/core/java/android/bluetooth/BluetoothAdapter.java
index 220b77b..1869c6f 100644
--- a/core/java/android/bluetooth/BluetoothAdapter.java
+++ b/core/java/android/bluetooth/BluetoothAdapter.java
@@ -25,7 +25,6 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityThread;
 import android.bluetooth.BluetoothProfile.ConnectionPolicy;
 import android.bluetooth.le.BluetoothLeAdvertiser;
@@ -36,6 +35,7 @@
 import android.bluetooth.le.ScanRecord;
 import android.bluetooth.le.ScanResult;
 import android.bluetooth.le.ScanSettings;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.BatteryStats;
 import android.os.Binder;
diff --git a/core/java/android/bluetooth/BluetoothClass.java b/core/java/android/bluetooth/BluetoothClass.java
index 260e2fb..905b0cee 100755
--- a/core/java/android/bluetooth/BluetoothClass.java
+++ b/core/java/android/bluetooth/BluetoothClass.java
@@ -17,7 +17,7 @@
 package android.bluetooth;
 
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/core/java/android/bluetooth/BluetoothCodecConfig.java b/core/java/android/bluetooth/BluetoothCodecConfig.java
index 08d0797..93e76fa 100644
--- a/core/java/android/bluetooth/BluetoothCodecConfig.java
+++ b/core/java/android/bluetooth/BluetoothCodecConfig.java
@@ -19,7 +19,7 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/bluetooth/BluetoothDevice.java b/core/java/android/bluetooth/BluetoothDevice.java
index 323c7d1..9fe4dd6 100644
--- a/core/java/android/bluetooth/BluetoothDevice.java
+++ b/core/java/android/bluetooth/BluetoothDevice.java
@@ -24,7 +24,7 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Handler;
 import android.os.Parcel;
diff --git a/core/java/android/bluetooth/BluetoothGatt.java b/core/java/android/bluetooth/BluetoothGatt.java
index d616b8f..f877f04 100644
--- a/core/java/android/bluetooth/BluetoothGatt.java
+++ b/core/java/android/bluetooth/BluetoothGatt.java
@@ -16,7 +16,7 @@
 
 package android.bluetooth;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Handler;
 import android.os.ParcelUuid;
diff --git a/core/java/android/bluetooth/BluetoothGattCharacteristic.java b/core/java/android/bluetooth/BluetoothGattCharacteristic.java
index edacf3e..7066f47 100644
--- a/core/java/android/bluetooth/BluetoothGattCharacteristic.java
+++ b/core/java/android/bluetooth/BluetoothGattCharacteristic.java
@@ -15,7 +15,7 @@
  */
 package android.bluetooth;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.ParcelUuid;
 import android.os.Parcelable;
diff --git a/core/java/android/bluetooth/BluetoothGattDescriptor.java b/core/java/android/bluetooth/BluetoothGattDescriptor.java
index 0783cd2..7cc2d6b 100644
--- a/core/java/android/bluetooth/BluetoothGattDescriptor.java
+++ b/core/java/android/bluetooth/BluetoothGattDescriptor.java
@@ -16,7 +16,7 @@
 
 package android.bluetooth;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.ParcelUuid;
 import android.os.Parcelable;
diff --git a/core/java/android/bluetooth/BluetoothGattService.java b/core/java/android/bluetooth/BluetoothGattService.java
index c20faf9..13d6d70 100644
--- a/core/java/android/bluetooth/BluetoothGattService.java
+++ b/core/java/android/bluetooth/BluetoothGattService.java
@@ -15,7 +15,7 @@
  */
 package android.bluetooth;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.ParcelUuid;
 import android.os.Parcelable;
diff --git a/core/java/android/bluetooth/BluetoothHeadset.java b/core/java/android/bluetooth/BluetoothHeadset.java
index 0955b10..1ba2bb5 100644
--- a/core/java/android/bluetooth/BluetoothHeadset.java
+++ b/core/java/android/bluetooth/BluetoothHeadset.java
@@ -23,7 +23,7 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.os.Binder;
diff --git a/core/java/android/bluetooth/BluetoothHeadsetClient.java b/core/java/android/bluetooth/BluetoothHeadsetClient.java
index 7ee29ff..6de1ffb 100644
--- a/core/java/android/bluetooth/BluetoothHeadsetClient.java
+++ b/core/java/android/bluetooth/BluetoothHeadsetClient.java
@@ -19,7 +19,7 @@
 import android.Manifest;
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Binder;
 import android.os.Bundle;
diff --git a/core/java/android/bluetooth/BluetoothHeadsetClientCall.java b/core/java/android/bluetooth/BluetoothHeadsetClientCall.java
index 7165dd5..d1a096e 100644
--- a/core/java/android/bluetooth/BluetoothHeadsetClientCall.java
+++ b/core/java/android/bluetooth/BluetoothHeadsetClientCall.java
@@ -16,7 +16,7 @@
 
 package android.bluetooth;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.os.SystemClock;
diff --git a/core/java/android/bluetooth/BluetoothHearingAid.java b/core/java/android/bluetooth/BluetoothHearingAid.java
index a65162a..38498bc 100644
--- a/core/java/android/bluetooth/BluetoothHearingAid.java
+++ b/core/java/android/bluetooth/BluetoothHearingAid.java
@@ -23,7 +23,7 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Binder;
 import android.os.IBinder;
diff --git a/core/java/android/bluetooth/BluetoothMap.java b/core/java/android/bluetooth/BluetoothMap.java
index f2ceabc..4674706 100644
--- a/core/java/android/bluetooth/BluetoothMap.java
+++ b/core/java/android/bluetooth/BluetoothMap.java
@@ -22,7 +22,7 @@
 import android.annotation.RequiresPermission;
 import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Binder;
 import android.os.IBinder;
diff --git a/core/java/android/bluetooth/BluetoothMapClient.java b/core/java/android/bluetooth/BluetoothMapClient.java
index 0ec473c..0aa5aac 100644
--- a/core/java/android/bluetooth/BluetoothMapClient.java
+++ b/core/java/android/bluetooth/BluetoothMapClient.java
@@ -19,8 +19,8 @@
 import android.Manifest;
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.net.Uri;
 import android.os.Binder;
diff --git a/core/java/android/bluetooth/BluetoothPan.java b/core/java/android/bluetooth/BluetoothPan.java
index f5de4ad..024bb06 100644
--- a/core/java/android/bluetooth/BluetoothPan.java
+++ b/core/java/android/bluetooth/BluetoothPan.java
@@ -25,7 +25,7 @@
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Binder;
 import android.os.IBinder;
diff --git a/core/java/android/bluetooth/BluetoothPbap.java b/core/java/android/bluetooth/BluetoothPbap.java
index 74ee2c3..e07ca52 100644
--- a/core/java/android/bluetooth/BluetoothPbap.java
+++ b/core/java/android/bluetooth/BluetoothPbap.java
@@ -23,7 +23,7 @@
 import android.annotation.SdkConstant;
 import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/bluetooth/BluetoothProfile.java b/core/java/android/bluetooth/BluetoothProfile.java
index 097a367..638e6de 100644
--- a/core/java/android/bluetooth/BluetoothProfile.java
+++ b/core/java/android/bluetooth/BluetoothProfile.java
@@ -22,7 +22,7 @@
 import android.annotation.RequiresPermission;
 import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
diff --git a/core/java/android/bluetooth/BluetoothSap.java b/core/java/android/bluetooth/BluetoothSap.java
index 9b4dabc..8bf1b58 100644
--- a/core/java/android/bluetooth/BluetoothSap.java
+++ b/core/java/android/bluetooth/BluetoothSap.java
@@ -19,7 +19,7 @@
 import android.Manifest;
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Binder;
 import android.os.IBinder;
diff --git a/core/java/android/bluetooth/BluetoothServerSocket.java b/core/java/android/bluetooth/BluetoothServerSocket.java
index 3a23808..88c186c 100644
--- a/core/java/android/bluetooth/BluetoothServerSocket.java
+++ b/core/java/android/bluetooth/BluetoothServerSocket.java
@@ -16,7 +16,7 @@
 
 package android.bluetooth;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Handler;
 import android.os.ParcelUuid;
 import android.util.Log;
diff --git a/core/java/android/bluetooth/BluetoothSocket.java b/core/java/android/bluetooth/BluetoothSocket.java
index 760166b..f774369 100644
--- a/core/java/android/bluetooth/BluetoothSocket.java
+++ b/core/java/android/bluetooth/BluetoothSocket.java
@@ -16,7 +16,7 @@
 
 package android.bluetooth;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.LocalSocket;
 import android.os.ParcelFileDescriptor;
 import android.os.ParcelUuid;
diff --git a/core/java/android/bluetooth/BluetoothUuid.java b/core/java/android/bluetooth/BluetoothUuid.java
index 7e96c23..e274af1 100644
--- a/core/java/android/bluetooth/BluetoothUuid.java
+++ b/core/java/android/bluetooth/BluetoothUuid.java
@@ -19,7 +19,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.ParcelUuid;
 
 import java.nio.ByteBuffer;
diff --git a/core/java/android/bluetooth/le/ScanRecord.java b/core/java/android/bluetooth/le/ScanRecord.java
index 97e3f52..c0c1aa1 100644
--- a/core/java/android/bluetooth/le/ScanRecord.java
+++ b/core/java/android/bluetooth/le/ScanRecord.java
@@ -18,8 +18,8 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.bluetooth.BluetoothUuid;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.ParcelUuid;
 import android.util.ArrayMap;
 import android.util.Log;
diff --git a/core/java/android/companion/AssociationRequest.java b/core/java/android/companion/AssociationRequest.java
index e4114c6..489d125 100644
--- a/core/java/android/companion/AssociationRequest.java
+++ b/core/java/android/companion/AssociationRequest.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.provider.OneTimeUseBuilder;
diff --git a/core/java/android/companion/BluetoothDeviceFilter.java b/core/java/android/companion/BluetoothDeviceFilter.java
index fe0123c..2649fbe 100644
--- a/core/java/android/companion/BluetoothDeviceFilter.java
+++ b/core/java/android/companion/BluetoothDeviceFilter.java
@@ -25,8 +25,8 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.bluetooth.BluetoothDevice;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.ParcelUuid;
 import android.provider.OneTimeUseBuilder;
diff --git a/core/java/android/companion/BluetoothDeviceFilterUtils.java b/core/java/android/companion/BluetoothDeviceFilterUtils.java
index 0f67f6b..24be45c 100644
--- a/core/java/android/companion/BluetoothDeviceFilterUtils.java
+++ b/core/java/android/companion/BluetoothDeviceFilterUtils.java
@@ -21,9 +21,9 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.bluetooth.BluetoothDevice;
 import android.bluetooth.le.ScanFilter;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.wifi.ScanResult;
 import android.os.ParcelUuid;
 import android.os.Parcelable;
diff --git a/core/java/android/companion/BluetoothLeDeviceFilter.java b/core/java/android/companion/BluetoothLeDeviceFilter.java
index 2701619..730bc60 100644
--- a/core/java/android/companion/BluetoothLeDeviceFilter.java
+++ b/core/java/android/companion/BluetoothLeDeviceFilter.java
@@ -25,11 +25,11 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.bluetooth.BluetoothDevice;
 import android.bluetooth.le.ScanFilter;
 import android.bluetooth.le.ScanRecord;
 import android.bluetooth.le.ScanResult;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.provider.OneTimeUseBuilder;
 import android.text.TextUtils;
diff --git a/core/java/android/companion/DeviceFilter.java b/core/java/android/companion/DeviceFilter.java
index dc7cf82..c9cb072 100644
--- a/core/java/android/companion/DeviceFilter.java
+++ b/core/java/android/companion/DeviceFilter.java
@@ -19,7 +19,7 @@
 
 import android.annotation.IntDef;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcelable;
 
 import java.lang.annotation.Retention;
diff --git a/core/java/android/content/AsyncTaskLoader.java b/core/java/android/content/AsyncTaskLoader.java
index bb7d5e4..14c3387 100644
--- a/core/java/android/content/AsyncTaskLoader.java
+++ b/core/java/android/content/AsyncTaskLoader.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.AsyncTask;
 import android.os.Handler;
 import android.os.OperationCanceledException;
diff --git a/core/java/android/content/BroadcastReceiver.java b/core/java/android/content/BroadcastReceiver.java
index f73a376..1d4d30d 100644
--- a/core/java/android/content/BroadcastReceiver.java
+++ b/core/java/android/content/BroadcastReceiver.java
@@ -18,11 +18,11 @@
 
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.app.ActivityThread;
 import android.app.IActivityManager;
 import android.app.QueuedWork;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.IBinder;
diff --git a/core/java/android/content/ClipData.java b/core/java/android/content/ClipData.java
index 88e2c22..5c67283 100644
--- a/core/java/android/content/ClipData.java
+++ b/core/java/android/content/ClipData.java
@@ -21,7 +21,7 @@
 import static android.content.ContentResolver.SCHEME_CONTENT;
 import static android.content.ContentResolver.SCHEME_FILE;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.AssetFileDescriptor;
 import android.graphics.Bitmap;
 import android.net.Uri;
diff --git a/core/java/android/content/ClipboardManager.java b/core/java/android/content/ClipboardManager.java
index dc1c700..dec9589 100644
--- a/core/java/android/content/ClipboardManager.java
+++ b/core/java/android/content/ClipboardManager.java
@@ -19,7 +19,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemService;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Handler;
 import android.os.RemoteException;
 import android.os.ServiceManager;
diff --git a/core/java/android/content/ComponentName.java b/core/java/android/content/ComponentName.java
index 18147b5..e955c2d 100644
--- a/core/java/android/content/ComponentName.java
+++ b/core/java/android/content/ComponentName.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.TextUtils;
diff --git a/core/java/android/content/ContentProvider.java b/core/java/android/content/ContentProvider.java
index 7cdd268..137faea 100644
--- a/core/java/android/content/ContentProvider.java
+++ b/core/java/android/content/ContentProvider.java
@@ -26,8 +26,8 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.AppOpsManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.PathPermission;
 import android.content.pm.ProviderInfo;
 import android.content.res.AssetFileDescriptor;
diff --git a/core/java/android/content/ContentProviderClient.java b/core/java/android/content/ContentProviderClient.java
index 93bf518..db8aa40 100644
--- a/core/java/android/content/ContentProviderClient.java
+++ b/core/java/android/content/ContentProviderClient.java
@@ -22,7 +22,7 @@
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.AssetFileDescriptor;
 import android.database.CrossProcessCursorWrapper;
 import android.database.Cursor;
diff --git a/core/java/android/content/ContentProviderNative.java b/core/java/android/content/ContentProviderNative.java
index 9948338..234f567 100644
--- a/core/java/android/content/ContentProviderNative.java
+++ b/core/java/android/content/ContentProviderNative.java
@@ -17,7 +17,7 @@
 package android.content;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.AssetFileDescriptor;
 import android.database.BulkCursorDescriptor;
 import android.database.BulkCursorToCursorAdaptor;
diff --git a/core/java/android/content/ContentProviderOperation.java b/core/java/android/content/ContentProviderOperation.java
index c201e4d..e401f2a 100644
--- a/core/java/android/content/ContentProviderOperation.java
+++ b/core/java/android/content/ContentProviderOperation.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Parcel;
diff --git a/core/java/android/content/ContentResolver.java b/core/java/android/content/ContentResolver.java
index 0a1bc85..a50831f 100644
--- a/core/java/android/content/ContentResolver.java
+++ b/core/java/android/content/ContentResolver.java
@@ -25,12 +25,12 @@
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.UserIdInt;
 import android.app.ActivityManager;
 import android.app.ActivityThread;
 import android.app.AppGlobals;
 import android.app.UriGrantsManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.res.AssetFileDescriptor;
 import android.content.res.Resources;
diff --git a/core/java/android/content/ContentValues.java b/core/java/android/content/ContentValues.java
index eafeed2..76d37fc 100644
--- a/core/java/android/content/ContentValues.java
+++ b/core/java/android/content/ContentValues.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.ArrayMap;
diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java
index f359641..0228b10 100644
--- a/core/java/android/content/Context.java
+++ b/core/java/android/content/Context.java
@@ -32,12 +32,12 @@
 import android.annotation.StyleableRes;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.UserIdInt;
 import android.app.ActivityManager;
 import android.app.IApplicationThread;
 import android.app.IServiceConnection;
 import android.app.VrManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.res.AssetManager;
diff --git a/core/java/android/content/ContextWrapper.java b/core/java/android/content/ContextWrapper.java
index 877557f..72cc021 100644
--- a/core/java/android/content/ContextWrapper.java
+++ b/core/java/android/content/ContextWrapper.java
@@ -21,9 +21,9 @@
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.IApplicationThread;
 import android.app.IServiceConnection;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.res.AssetManager;
diff --git a/core/java/android/content/CursorEntityIterator.java b/core/java/android/content/CursorEntityIterator.java
index 2c630d2..952366d 100644
--- a/core/java/android/content/CursorEntityIterator.java
+++ b/core/java/android/content/CursorEntityIterator.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.database.Cursor;
 import android.os.RemoteException;
 
diff --git a/core/java/android/content/CursorLoader.java b/core/java/android/content/CursorLoader.java
index 4ccafab..4ff5cca 100644
--- a/core/java/android/content/CursorLoader.java
+++ b/core/java/android/content/CursorLoader.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.CancellationSignal;
diff --git a/core/java/android/content/Entity.java b/core/java/android/content/Entity.java
index ff4f150..13137c4 100644
--- a/core/java/android/content/Entity.java
+++ b/core/java/android/content/Entity.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.Uri;
 import android.os.Build;
 
diff --git a/core/java/android/content/IContentProvider.java b/core/java/android/content/IContentProvider.java
index 0427c2f..92df7ee 100644
--- a/core/java/android/content/IContentProvider.java
+++ b/core/java/android/content/IContentProvider.java
@@ -17,7 +17,7 @@
 package android.content;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.AssetFileDescriptor;
 import android.database.Cursor;
 import android.net.Uri;
diff --git a/core/java/android/content/Intent.java b/core/java/android/content/Intent.java
index a6867ff..9c7bf1f 100644
--- a/core/java/android/content/Intent.java
+++ b/core/java/android/content/Intent.java
@@ -28,8 +28,8 @@
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.AppGlobals;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.ComponentInfo;
diff --git a/core/java/android/content/IntentFilter.java b/core/java/android/content/IntentFilter.java
index 099dea2..4d0ecff 100644
--- a/core/java/android/content/IntentFilter.java
+++ b/core/java/android/content/IntentFilter.java
@@ -18,7 +18,7 @@
 
 import android.annotation.IntDef;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Parcel;
diff --git a/core/java/android/content/IntentSender.java b/core/java/android/content/IntentSender.java
index ec0bac4..f40dc29 100644
--- a/core/java/android/content/IntentSender.java
+++ b/core/java/android/content/IntentSender.java
@@ -16,14 +16,14 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Bundle;
-import android.os.RemoteException;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Parcel;
 import android.os.Parcelable;
+import android.os.RemoteException;
 import android.os.UserHandle;
 import android.util.AndroidException;
 
diff --git a/core/java/android/content/RestrictionsManager.java b/core/java/android/content/RestrictionsManager.java
index bbdab04..885eb70 100644
--- a/core/java/android/content/RestrictionsManager.java
+++ b/core/java/android/content/RestrictionsManager.java
@@ -17,9 +17,9 @@
 package android.content;
 
 import android.annotation.SystemService;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.admin.DevicePolicyManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
diff --git a/core/java/android/content/SearchRecentSuggestionsProvider.java b/core/java/android/content/SearchRecentSuggestionsProvider.java
index 8ee7b9e..fc3ddf6 100644
--- a/core/java/android/content/SearchRecentSuggestionsProvider.java
+++ b/core/java/android/content/SearchRecentSuggestionsProvider.java
@@ -16,8 +16,8 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.SearchManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
diff --git a/core/java/android/content/SyncAdapterType.java b/core/java/android/content/SyncAdapterType.java
index 8c8fe5a..7bcdbfd 100644
--- a/core/java/android/content/SyncAdapterType.java
+++ b/core/java/android/content/SyncAdapterType.java
@@ -17,11 +17,11 @@
 package android.content;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
-import android.text.TextUtils;
-import android.os.Parcelable;
 import android.os.Parcel;
+import android.os.Parcelable;
+import android.text.TextUtils;
 
 /**
  * Value type that represents a SyncAdapterType. This object overrides {@link #equals} and
diff --git a/core/java/android/content/SyncAdaptersCache.java b/core/java/android/content/SyncAdaptersCache.java
index d4e5217..58445a7 100644
--- a/core/java/android/content/SyncAdaptersCache.java
+++ b/core/java/android/content/SyncAdaptersCache.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.RegisteredServicesCache;
 import android.content.pm.XmlSerializerAndParser;
 import android.content.res.Resources;
@@ -29,8 +29,8 @@
 import com.android.internal.annotations.GuardedBy;
 
 import org.xmlpull.v1.XmlPullParser;
-import org.xmlpull.v1.XmlSerializer;
 import org.xmlpull.v1.XmlPullParserException;
+import org.xmlpull.v1.XmlSerializer;
 
 import java.io.IOException;
 import java.util.ArrayList;
diff --git a/core/java/android/content/SyncContext.java b/core/java/android/content/SyncContext.java
index 50d1dc9..4a9f66c 100644
--- a/core/java/android/content/SyncContext.java
+++ b/core/java/android/content/SyncContext.java
@@ -16,10 +16,10 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.os.IBinder;
 import android.os.RemoteException;
 import android.os.SystemClock;
-import android.os.IBinder;
 
 public class SyncContext {
     private ISyncContext mSyncContext;
diff --git a/core/java/android/content/SyncInfo.java b/core/java/android/content/SyncInfo.java
index d3f2eed..017a92b 100644
--- a/core/java/android/content/SyncInfo.java
+++ b/core/java/android/content/SyncInfo.java
@@ -17,7 +17,7 @@
 package android.content;
 
 import android.accounts.Account;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/core/java/android/content/SyncRequest.java b/core/java/android/content/SyncRequest.java
index 5f1f180..9e568a4 100644
--- a/core/java/android/content/SyncRequest.java
+++ b/core/java/android/content/SyncRequest.java
@@ -17,7 +17,7 @@
 package android.content;
 
 import android.accounts.Account;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Parcel;
diff --git a/core/java/android/content/SyncStatusInfo.java b/core/java/android/content/SyncStatusInfo.java
index 3f64515..620fdb7 100644
--- a/core/java/android/content/SyncStatusInfo.java
+++ b/core/java/android/content/SyncStatusInfo.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.Log;
diff --git a/core/java/android/content/UndoManager.java b/core/java/android/content/UndoManager.java
index f9c58d6..ed9cd86 100644
--- a/core/java/android/content/UndoManager.java
+++ b/core/java/android/content/UndoManager.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.text.TextUtils;
 import android.util.ArrayMap;
diff --git a/core/java/android/content/UndoOperation.java b/core/java/android/content/UndoOperation.java
index a425486..235d721 100644
--- a/core/java/android/content/UndoOperation.java
+++ b/core/java/android/content/UndoOperation.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/content/UriMatcher.java b/core/java/android/content/UriMatcher.java
index 208bc01..7fa48f0 100644
--- a/core/java/android/content/UriMatcher.java
+++ b/core/java/android/content/UriMatcher.java
@@ -16,7 +16,7 @@
 
 package android.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.Uri;
 
 import java.util.ArrayList;
diff --git a/core/java/android/content/om/OverlayInfo.java b/core/java/android/content/om/OverlayInfo.java
index 1a78f79..a3487be 100644
--- a/core/java/android/content/om/OverlayInfo.java
+++ b/core/java/android/content/om/OverlayInfo.java
@@ -20,8 +20,8 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.UserIdInt;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/content/pm/ActivityInfo.java b/core/java/android/content/pm/ActivityInfo.java
index 95e5f6b..43dd1f45 100644
--- a/core/java/android/content/pm/ActivityInfo.java
+++ b/core/java/android/content/pm/ActivityInfo.java
@@ -18,7 +18,7 @@
 
 import android.annotation.IntDef;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Intent;
 import android.content.res.Configuration;
diff --git a/core/java/android/content/pm/ApplicationInfo.java b/core/java/android/content/pm/ApplicationInfo.java
index 0ea1845..49d2201 100644
--- a/core/java/android/content/pm/ApplicationInfo.java
+++ b/core/java/android/content/pm/ApplicationInfo.java
@@ -22,7 +22,7 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.res.Resources;
diff --git a/core/java/android/content/pm/BaseParceledListSlice.java b/core/java/android/content/pm/BaseParceledListSlice.java
index 4178309..5d1a08c 100644
--- a/core/java/android/content/pm/BaseParceledListSlice.java
+++ b/core/java/android/content/pm/BaseParceledListSlice.java
@@ -16,7 +16,7 @@
 
 package android.content.pm;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Binder;
 import android.os.IBinder;
 import android.os.Parcel;
diff --git a/core/java/android/content/pm/ComponentInfo.java b/core/java/android/content/pm/ComponentInfo.java
index 29612c2..988b280 100644
--- a/core/java/android/content/pm/ComponentInfo.java
+++ b/core/java/android/content/pm/ComponentInfo.java
@@ -16,7 +16,7 @@
 
 package android.content.pm;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.graphics.drawable.Drawable;
 import android.os.Parcel;
diff --git a/core/java/android/content/pm/LauncherActivityInfo.java b/core/java/android/content/pm/LauncherActivityInfo.java
index 1451431..67deb82 100644
--- a/core/java/android/content/pm/LauncherActivityInfo.java
+++ b/core/java/android/content/pm/LauncherActivityInfo.java
@@ -16,7 +16,7 @@
 
 package android.content.pm;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.pm.PackageManager.NameNotFoundException;
diff --git a/core/java/android/content/pm/LauncherApps.java b/core/java/android/content/pm/LauncherApps.java
index 3933e81..ac8eab7 100644
--- a/core/java/android/content/pm/LauncherApps.java
+++ b/core/java/android/content/pm/LauncherApps.java
@@ -25,10 +25,10 @@
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
 import android.appwidget.AppWidgetManager;
 import android.appwidget.AppWidgetProviderInfo;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ActivityNotFoundException;
 import android.content.ComponentName;
 import android.content.Context;
diff --git a/core/java/android/content/pm/PackageInfo.java b/core/java/android/content/pm/PackageInfo.java
index d6fb28f..f4d4a8d 100644
--- a/core/java/android/content/pm/PackageInfo.java
+++ b/core/java/android/content/pm/PackageInfo.java
@@ -17,7 +17,7 @@
 package android.content.pm;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/core/java/android/content/pm/PackageInfoLite.java b/core/java/android/content/pm/PackageInfoLite.java
index f5442ec..6743a3f 100644
--- a/core/java/android/content/pm/PackageInfoLite.java
+++ b/core/java/android/content/pm/PackageInfoLite.java
@@ -16,7 +16,7 @@
 
 package android.content.pm;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/core/java/android/content/pm/PackageInstaller.java b/core/java/android/content/pm/PackageInstaller.java
index 1099d8b..78db3d8 100644
--- a/core/java/android/content/pm/PackageInstaller.java
+++ b/core/java/android/content/pm/PackageInstaller.java
@@ -26,9 +26,9 @@
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.app.AppGlobals;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.content.IntentSender;
 import android.content.pm.PackageManager.DeleteFlags;
diff --git a/core/java/android/content/pm/PackageManager.java b/core/java/android/content/pm/PackageManager.java
index 81670cd..0ae00fb 100644
--- a/core/java/android/content/pm/PackageManager.java
+++ b/core/java/android/content/pm/PackageManager.java
@@ -29,7 +29,6 @@
 import android.annotation.StringRes;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.UserIdInt;
 import android.annotation.XmlRes;
 import android.app.ActivityManager;
@@ -38,6 +37,7 @@
 import android.app.PackageInstallObserver;
 import android.app.admin.DevicePolicyManager;
 import android.app.usage.StorageStatsManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/content/pm/PackageParser.java b/core/java/android/content/pm/PackageParser.java
index 812ae93..0e61016 100644
--- a/core/java/android/content/pm/PackageParser.java
+++ b/core/java/android/content/pm/PackageParser.java
@@ -47,11 +47,11 @@
 import android.annotation.Nullable;
 import android.annotation.StringRes;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.apex.ApexInfo;
 import android.app.ActivityTaskManager;
 import android.app.ActivityThread;
 import android.app.ResourcesManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Intent;
 import android.content.IntentFilter;
diff --git a/core/java/android/content/pm/PackageStats.java b/core/java/android/content/pm/PackageStats.java
index b0fecfa..7c12527 100644
--- a/core/java/android/content/pm/PackageStats.java
+++ b/core/java/android/content/pm/PackageStats.java
@@ -16,8 +16,8 @@
 
 package android.content.pm;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.usage.StorageStatsManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/core/java/android/content/pm/PackageUserState.java b/core/java/android/content/pm/PackageUserState.java
index 249b691..d1e1132 100644
--- a/core/java/android/content/pm/PackageUserState.java
+++ b/core/java/android/content/pm/PackageUserState.java
@@ -27,7 +27,7 @@
 import static android.content.pm.PackageManager.MATCH_DISABLED_UNTIL_USED_COMPONENTS;
 import static android.content.pm.PackageManager.MATCH_SYSTEM_ONLY;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.BaseBundle;
 import android.os.Debug;
 import android.os.PersistableBundle;
diff --git a/core/java/android/content/pm/ParceledListSlice.java b/core/java/android/content/pm/ParceledListSlice.java
index dccc524..73119e0 100644
--- a/core/java/android/content/pm/ParceledListSlice.java
+++ b/core/java/android/content/pm/ParceledListSlice.java
@@ -16,7 +16,7 @@
 
 package android.content.pm;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/core/java/android/content/pm/PermissionInfo.java b/core/java/android/content/pm/PermissionInfo.java
index c77c53f..89a1c6a 100644
--- a/core/java/android/content/pm/PermissionInfo.java
+++ b/core/java/android/content/pm/PermissionInfo.java
@@ -22,7 +22,7 @@
 import android.annotation.StringRes;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.TextUtils;
diff --git a/core/java/android/content/pm/RegisteredServicesCache.java b/core/java/android/content/pm/RegisteredServicesCache.java
index 23fbefb..bd909c7 100644
--- a/core/java/android/content/pm/RegisteredServicesCache.java
+++ b/core/java/android/content/pm/RegisteredServicesCache.java
@@ -17,7 +17,7 @@
 package android.content.pm;
 
 import android.Manifest;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
 import android.content.Context;
@@ -43,11 +43,11 @@
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.FastXmlSerializer;
 
+import libcore.io.IoUtils;
+
 import com.google.android.collect.Lists;
 import com.google.android.collect.Maps;
 
-import libcore.io.IoUtils;
-
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 import org.xmlpull.v1.XmlSerializer;
diff --git a/core/java/android/content/pm/ResolveInfo.java b/core/java/android/content/pm/ResolveInfo.java
index 1734182..7755fe3 100644
--- a/core/java/android/content/pm/ResolveInfo.java
+++ b/core/java/android/content/pm/ResolveInfo.java
@@ -17,7 +17,7 @@
 package android.content.pm;
 
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.IntentFilter;
 import android.graphics.drawable.Drawable;
diff --git a/core/java/android/content/pm/ShortcutInfo.java b/core/java/android/content/pm/ShortcutInfo.java
index 58aacc2..e14bcf6 100644
--- a/core/java/android/content/pm/ShortcutInfo.java
+++ b/core/java/android/content/pm/ShortcutInfo.java
@@ -20,11 +20,11 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.UserIdInt;
 import android.app.Notification;
 import android.app.Person;
 import android.app.TaskStackBuilder;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/content/pm/ShortcutManager.java b/core/java/android/content/pm/ShortcutManager.java
index f851799..dde8865 100644
--- a/core/java/android/content/pm/ShortcutManager.java
+++ b/core/java/android/content/pm/ShortcutManager.java
@@ -22,9 +22,9 @@
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.UserIdInt;
 import android.app.usage.UsageStatsManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/content/pm/Signature.java b/core/java/android/content/pm/Signature.java
index 25a4dca..3b84ae7 100644
--- a/core/java/android/content/pm/Signature.java
+++ b/core/java/android/content/pm/Signature.java
@@ -16,7 +16,7 @@
 
 package android.content.pm;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/content/pm/UserInfo.java b/core/java/android/content/pm/UserInfo.java
index 2b1b32e..caf0958 100644
--- a/core/java/android/content/pm/UserInfo.java
+++ b/core/java/android/content/pm/UserInfo.java
@@ -16,10 +16,9 @@
 
 package android.content.pm;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.os.SystemProperties;
 import android.os.UserHandle;
 import android.os.UserManager;
 
diff --git a/core/java/android/content/pm/VerifierInfo.java b/core/java/android/content/pm/VerifierInfo.java
index 224ca62..5f88555 100644
--- a/core/java/android/content/pm/VerifierInfo.java
+++ b/core/java/android/content/pm/VerifierInfo.java
@@ -16,7 +16,7 @@
 
 package android.content.pm;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/content/pm/XmlSerializerAndParser.java b/core/java/android/content/pm/XmlSerializerAndParser.java
index 6d24800..5dce839 100644
--- a/core/java/android/content/pm/XmlSerializerAndParser.java
+++ b/core/java/android/content/pm/XmlSerializerAndParser.java
@@ -16,11 +16,12 @@
 
 package android.content.pm;
 
-import org.xmlpull.v1.XmlSerializer;
+import android.compat.annotation.UnsupportedAppUsage;
+
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
+import org.xmlpull.v1.XmlSerializer;
 
-import android.annotation.UnsupportedAppUsage;
 import java.io.IOException;
 
 /** @hide */
diff --git a/core/java/android/content/res/ApkAssets.java b/core/java/android/content/res/ApkAssets.java
index 69462ab..baa3e84 100644
--- a/core/java/android/content/res/ApkAssets.java
+++ b/core/java/android/content/res/ApkAssets.java
@@ -16,7 +16,7 @@
 package android.content.res;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.util.Preconditions;
diff --git a/core/java/android/content/res/AssetFileDescriptor.java b/core/java/android/content/res/AssetFileDescriptor.java
index 2ba5579..e93ec00 100644
--- a/core/java/android/content/res/AssetFileDescriptor.java
+++ b/core/java/android/content/res/AssetFileDescriptor.java
@@ -16,7 +16,7 @@
 
 package android.content.res;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Bundle;
 import android.os.Parcel;
 import android.os.ParcelFileDescriptor;
diff --git a/core/java/android/content/res/AssetManager.java b/core/java/android/content/res/AssetManager.java
index e5ef67b..a70eff9 100644
--- a/core/java/android/content/res/AssetManager.java
+++ b/core/java/android/content/res/AssetManager.java
@@ -24,7 +24,7 @@
 import android.annotation.StringRes;
 import android.annotation.StyleRes;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ActivityInfo;
 import android.content.res.Configuration.NativeConfig;
 import android.os.ParcelFileDescriptor;
diff --git a/core/java/android/content/res/ColorStateList.java b/core/java/android/content/res/ColorStateList.java
index b5b097b..f23c802 100644
--- a/core/java/android/content/res/ColorStateList.java
+++ b/core/java/android/content/res/ColorStateList.java
@@ -19,9 +19,18 @@
 import android.annotation.ColorInt;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ActivityInfo.Config;
 import android.content.res.Resources.Theme;
 import android.graphics.Color;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.util.MathUtils;
+import android.util.SparseArray;
+import android.util.StateSet;
+import android.util.Xml;
 
 import com.android.internal.R;
 import com.android.internal.util.ArrayUtils;
@@ -30,16 +39,6 @@
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 
-import android.annotation.UnsupportedAppUsage;
-import android.util.AttributeSet;
-import android.util.Log;
-import android.util.MathUtils;
-import android.util.SparseArray;
-import android.util.StateSet;
-import android.util.Xml;
-import android.os.Parcel;
-import android.os.Parcelable;
-
 import java.io.IOException;
 import java.lang.ref.WeakReference;
 import java.util.Arrays;
diff --git a/core/java/android/content/res/CompatibilityInfo.java b/core/java/android/content/res/CompatibilityInfo.java
index f3b7553..c66c70a2 100644
--- a/core/java/android/content/res/CompatibilityInfo.java
+++ b/core/java/android/content/res/CompatibilityInfo.java
@@ -16,7 +16,7 @@
 
 package android.content.res;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ApplicationInfo;
 import android.graphics.Canvas;
 import android.graphics.PointF;
diff --git a/core/java/android/content/res/Configuration.java b/core/java/android/content/res/Configuration.java
index e40e566..cec6382 100644
--- a/core/java/android/content/res/Configuration.java
+++ b/core/java/android/content/res/Configuration.java
@@ -45,8 +45,8 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.WindowConfiguration;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.LocaleProto;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ActivityInfo.Config;
diff --git a/core/java/android/content/res/ConfigurationBoundResourceCache.java b/core/java/android/content/res/ConfigurationBoundResourceCache.java
index 848790f..5e10a57 100644
--- a/core/java/android/content/res/ConfigurationBoundResourceCache.java
+++ b/core/java/android/content/res/ConfigurationBoundResourceCache.java
@@ -16,7 +16,7 @@
 
 package android.content.res;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ActivityInfo.Config;
 
 /**
diff --git a/core/java/android/content/res/DrawableCache.java b/core/java/android/content/res/DrawableCache.java
index 90604b8..5497e61 100644
--- a/core/java/android/content/res/DrawableCache.java
+++ b/core/java/android/content/res/DrawableCache.java
@@ -16,7 +16,7 @@
 
 package android.content.res;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.drawable.Drawable;
 
 /**
diff --git a/core/java/android/content/res/ObbInfo.java b/core/java/android/content/res/ObbInfo.java
index 8af27ca..c477abc 100644
--- a/core/java/android/content/res/ObbInfo.java
+++ b/core/java/android/content/res/ObbInfo.java
@@ -16,7 +16,7 @@
 
 package android.content.res;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/content/res/Resources.java b/core/java/android/content/res/Resources.java
index d7e4e14..4f6449e 100644
--- a/core/java/android/content/res/Resources.java
+++ b/core/java/android/content/res/Resources.java
@@ -39,8 +39,8 @@
 import android.annotation.StringRes;
 import android.annotation.StyleRes;
 import android.annotation.StyleableRes;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.XmlRes;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ActivityInfo.Config;
 import android.graphics.Movie;
diff --git a/core/java/android/content/res/ResourcesImpl.java b/core/java/android/content/res/ResourcesImpl.java
index 794be9e..86ba0b6 100644
--- a/core/java/android/content/res/ResourcesImpl.java
+++ b/core/java/android/content/res/ResourcesImpl.java
@@ -27,7 +27,7 @@
 import android.annotation.RawRes;
 import android.annotation.StyleRes;
 import android.annotation.StyleableRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ActivityInfo.Config;
 import android.content.res.AssetManager.AssetInputStream;
diff --git a/core/java/android/content/res/ResourcesKey.java b/core/java/android/content/res/ResourcesKey.java
index 1db2dd8..a29fea0 100644
--- a/core/java/android/content/res/ResourcesKey.java
+++ b/core/java/android/content/res/ResourcesKey.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.text.TextUtils;
 
 import java.util.Arrays;
diff --git a/core/java/android/content/res/StringBlock.java b/core/java/android/content/res/StringBlock.java
index b7bc822..6258892 100644
--- a/core/java/android/content/res/StringBlock.java
+++ b/core/java/android/content/res/StringBlock.java
@@ -16,7 +16,7 @@
 
 package android.content.res;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Rect;
diff --git a/core/java/android/content/res/ThemedResourceCache.java b/core/java/android/content/res/ThemedResourceCache.java
index 06cafdb..f24e6f2 100644
--- a/core/java/android/content/res/ThemedResourceCache.java
+++ b/core/java/android/content/res/ThemedResourceCache.java
@@ -18,12 +18,12 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ActivityInfo.Config;
 import android.content.res.Resources.Theme;
 import android.content.res.Resources.ThemeKey;
-import android.util.LongSparseArray;
 import android.util.ArrayMap;
+import android.util.LongSparseArray;
 
 import java.lang.ref.WeakReference;
 
diff --git a/core/java/android/content/res/TypedArray.java b/core/java/android/content/res/TypedArray.java
index b79cf65..90affdf 100644
--- a/core/java/android/content/res/TypedArray.java
+++ b/core/java/android/content/res/TypedArray.java
@@ -20,7 +20,7 @@
 import android.annotation.ColorInt;
 import android.annotation.Nullable;
 import android.annotation.StyleableRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ActivityInfo.Config;
 import android.graphics.Typeface;
diff --git a/core/java/android/content/res/XmlBlock.java b/core/java/android/content/res/XmlBlock.java
index 626bf77..cb93cbf 100644
--- a/core/java/android/content/res/XmlBlock.java
+++ b/core/java/android/content/res/XmlBlock.java
@@ -20,7 +20,7 @@
 
 import android.annotation.AnyRes;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.TypedValue;
 
 import com.android.internal.util.XmlUtils;
diff --git a/core/java/android/net/INetworkStatsService.aidl b/core/java/android/net/INetworkStatsService.aidl
index 9994f9f..5fa515a 100644
--- a/core/java/android/net/INetworkStatsService.aidl
+++ b/core/java/android/net/INetworkStatsService.aidl
@@ -23,6 +23,8 @@
 import android.net.NetworkStats;
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
+import android.net.netstats.provider.INetworkStatsProvider;
+import android.net.netstats.provider.INetworkStatsProviderCallback;
 import android.os.IBinder;
 import android.os.Messenger;
 import com.android.internal.net.VpnInfo;
@@ -89,4 +91,7 @@
     /** Get the total network stats information since boot */
     long getTotalStats(int type);
 
+    /** Registers a network stats provider */
+    INetworkStatsProviderCallback registerNetworkStatsProvider(String tag,
+            in INetworkStatsProvider provider);
 }
diff --git a/core/java/android/net/nsd/NsdServiceInfo.java b/core/java/android/net/nsd/NsdServiceInfo.java
index 459b140..0946499 100644
--- a/core/java/android/net/nsd/NsdServiceInfo.java
+++ b/core/java/android/net/nsd/NsdServiceInfo.java
@@ -17,13 +17,13 @@
 package android.net.nsd;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
-import android.os.Parcelable;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
+import android.os.Parcelable;
 import android.text.TextUtils;
+import android.util.ArrayMap;
 import android.util.Base64;
 import android.util.Log;
-import android.util.ArrayMap;
 
 import java.io.UnsupportedEncodingException;
 import java.net.InetAddress;
diff --git a/core/java/android/nfc/ErrorCodes.java b/core/java/android/nfc/ErrorCodes.java
index 98e31ad..d2c81cd 100644
--- a/core/java/android/nfc/ErrorCodes.java
+++ b/core/java/android/nfc/ErrorCodes.java
@@ -16,7 +16,7 @@
 
 package android.nfc;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * This class defines all the error codes that can be returned by the service
diff --git a/core/java/android/nfc/NdefRecord.java b/core/java/android/nfc/NdefRecord.java
index 5044a86..fe316c4 100644
--- a/core/java/android/nfc/NdefRecord.java
+++ b/core/java/android/nfc/NdefRecord.java
@@ -16,7 +16,7 @@
 
 package android.nfc;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Parcel;
diff --git a/core/java/android/nfc/NfcActivityManager.java b/core/java/android/nfc/NfcActivityManager.java
index abfa133..935374d1 100644
--- a/core/java/android/nfc/NfcActivityManager.java
+++ b/core/java/android/nfc/NfcActivityManager.java
@@ -16,9 +16,9 @@
 
 package android.nfc;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.Application;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ContentProvider;
 import android.content.Intent;
 import android.net.Uri;
@@ -26,7 +26,6 @@
 import android.os.Binder;
 import android.os.Bundle;
 import android.os.RemoteException;
-import android.os.UserHandle;
 import android.util.Log;
 
 import java.util.ArrayList;
diff --git a/core/java/android/nfc/NfcAdapter.java b/core/java/android/nfc/NfcAdapter.java
index 7ab984f..d320f61 100644
--- a/core/java/android/nfc/NfcAdapter.java
+++ b/core/java/android/nfc/NfcAdapter.java
@@ -21,11 +21,11 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.ActivityThread;
 import android.app.OnActivityPausedListener;
 import android.app.PendingIntent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.IntentFilter;
 import android.content.pm.IPackageManager;
diff --git a/core/java/android/nfc/NfcManager.java b/core/java/android/nfc/NfcManager.java
index 030066e..644e312 100644
--- a/core/java/android/nfc/NfcManager.java
+++ b/core/java/android/nfc/NfcManager.java
@@ -17,7 +17,7 @@
 package android.nfc;
 
 import android.annotation.SystemService;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Build;
 
diff --git a/core/java/android/nfc/Tag.java b/core/java/android/nfc/Tag.java
index 5a4c465..8bb2df0 100644
--- a/core/java/android/nfc/Tag.java
+++ b/core/java/android/nfc/Tag.java
@@ -16,7 +16,7 @@
 
 package android.nfc;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.nfc.tech.IsoDep;
 import android.nfc.tech.MifareClassic;
diff --git a/core/java/android/nfc/cardemulation/AidGroup.java b/core/java/android/nfc/cardemulation/AidGroup.java
index 77b5552..c4f5e0b 100644
--- a/core/java/android/nfc/cardemulation/AidGroup.java
+++ b/core/java/android/nfc/cardemulation/AidGroup.java
@@ -16,18 +16,18 @@
 
 package android.nfc.cardemulation;
 
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Log;
 
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 import org.xmlpull.v1.XmlSerializer;
 
-import android.annotation.UnsupportedAppUsage;
-import android.os.Parcel;
-import android.os.Parcelable;
-import android.util.Log;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
 
 /**
  * The AidGroup class represents a group of Application Identifiers (AIDs).
diff --git a/core/java/android/nfc/cardemulation/ApduServiceInfo.java b/core/java/android/nfc/cardemulation/ApduServiceInfo.java
index d9000e4..8da9db1 100644
--- a/core/java/android/nfc/cardemulation/ApduServiceInfo.java
+++ b/core/java/android/nfc/cardemulation/ApduServiceInfo.java
@@ -16,7 +16,7 @@
 
 package android.nfc.cardemulation;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
diff --git a/core/java/android/os/AsyncResult.java b/core/java/android/os/AsyncResult.java
index 58a2701..e80528b 100644
--- a/core/java/android/os/AsyncResult.java
+++ b/core/java/android/os/AsyncResult.java
@@ -16,8 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
-import android.os.Message;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /** @hide */
 public class AsyncResult
diff --git a/core/java/android/os/AsyncTask.java b/core/java/android/os/AsyncTask.java
index b37e176..e1dabd3 100644
--- a/core/java/android/os/AsyncTask.java
+++ b/core/java/android/os/AsyncTask.java
@@ -18,8 +18,8 @@
 
 import android.annotation.MainThread;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.WorkerThread;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import java.util.ArrayDeque;
 import java.util.concurrent.Callable;
diff --git a/core/java/android/os/BaseBundle.java b/core/java/android/os/BaseBundle.java
index 7f63f8f..e6ad917 100644
--- a/core/java/android/os/BaseBundle.java
+++ b/core/java/android/os/BaseBundle.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.ArrayMap;
 import android.util.Log;
 import android.util.MathUtils;
diff --git a/core/java/android/os/BatteryManager.java b/core/java/android/os/BatteryManager.java
index 5ced86c..12ec0a0 100644
--- a/core/java/android/os/BatteryManager.java
+++ b/core/java/android/os/BatteryManager.java
@@ -21,7 +21,7 @@
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.hardware.health.V1_0.Constants;
diff --git a/core/java/android/os/BatteryStats.java b/core/java/android/os/BatteryStats.java
index 6efe1de4..44f7fa3 100644
--- a/core/java/android/os/BatteryStats.java
+++ b/core/java/android/os/BatteryStats.java
@@ -19,9 +19,9 @@
 import static android.app.ActivityManager.PROCESS_STATE_BOUND_TOP;
 import static android.app.ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE_LOCATION;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.app.job.JobParameters;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.server.ServerProtoEnums;
diff --git a/core/java/android/os/Binder.java b/core/java/android/os/Binder.java
index 2e6d2cc..9c4a36f 100644
--- a/core/java/android/os/Binder.java
+++ b/core/java/android/os/Binder.java
@@ -19,7 +19,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.ExceptionUtils;
 import android.util.Log;
 import android.util.Slog;
diff --git a/core/java/android/os/Broadcaster.java b/core/java/android/os/Broadcaster.java
index 6ac7f1a..d1a953f 100644
--- a/core/java/android/os/Broadcaster.java
+++ b/core/java/android/os/Broadcaster.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /** @hide */
 public class Broadcaster
diff --git a/core/java/android/os/Build.java b/core/java/android/os/Build.java
index 46b497d..6750fc7 100755
--- a/core/java/android/os/Build.java
+++ b/core/java/android/os/Build.java
@@ -22,9 +22,9 @@
 import android.annotation.SuppressAutoDoc;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityThread;
 import android.app.Application;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.sysprop.TelephonyProperties;
 import android.text.TextUtils;
diff --git a/core/java/android/os/Bundle.java b/core/java/android/os/Bundle.java
index b82e517..a2071e0 100644
--- a/core/java/android/os/Bundle.java
+++ b/core/java/android/os/Bundle.java
@@ -17,7 +17,7 @@
 package android.os;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.ArrayMap;
 import android.util.Size;
 import android.util.SizeF;
diff --git a/core/java/android/os/CancellationSignal.java b/core/java/android/os/CancellationSignal.java
index 99fb998..260f7ad 100644
--- a/core/java/android/os/CancellationSignal.java
+++ b/core/java/android/os/CancellationSignal.java
@@ -16,9 +16,7 @@
 
 package android.os;
 
-import android.os.ICancellationSignal;
-
-import dalvik.annotation.compat.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Provides the ability to cancel an operation in progress.
diff --git a/core/java/android/os/Debug.java b/core/java/android/os/Debug.java
index d7ed055..5037922 100644
--- a/core/java/android/os/Debug.java
+++ b/core/java/android/os/Debug.java
@@ -18,8 +18,8 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.AppGlobals;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.util.Log;
 
diff --git a/core/java/android/os/DropBoxManager.java b/core/java/android/os/DropBoxManager.java
index b7cccc6..18ba5a8 100644
--- a/core/java/android/os/DropBoxManager.java
+++ b/core/java/android/os/DropBoxManager.java
@@ -24,7 +24,7 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemService;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.util.Log;
 
diff --git a/core/java/android/os/Environment.java b/core/java/android/os/Environment.java
index 7a131e5..6639d57 100644
--- a/core/java/android/os/Environment.java
+++ b/core/java/android/os/Environment.java
@@ -20,10 +20,10 @@
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.AppGlobals;
 import android.app.AppOpsManager;
 import android.app.admin.DevicePolicyManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
diff --git a/core/java/android/os/FileObserver.java b/core/java/android/os/FileObserver.java
index 4d9ebc2..4628910 100644
--- a/core/java/android/os/FileObserver.java
+++ b/core/java/android/os/FileObserver.java
@@ -19,7 +19,7 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.Log;
 
 import java.io.File;
diff --git a/core/java/android/os/FileUtils.java b/core/java/android/os/FileUtils.java
index 2ac3def..a47fbba 100644
--- a/core/java/android/os/FileUtils.java
+++ b/core/java/android/os/FileUtils.java
@@ -40,7 +40,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ContentResolver;
 import android.provider.DocumentsContract.Document;
 import android.system.ErrnoException;
diff --git a/core/java/android/os/Handler.java b/core/java/android/os/Handler.java
index a99bdabe..fa7404c 100644
--- a/core/java/android/os/Handler.java
+++ b/core/java/android/os/Handler.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.Log;
 import android.util.Printer;
 
diff --git a/core/java/android/os/HwBinder.java b/core/java/android/os/HwBinder.java
index 09afdc7..7c42c36 100644
--- a/core/java/android/os/HwBinder.java
+++ b/core/java/android/os/HwBinder.java
@@ -18,7 +18,7 @@
 
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import libcore.util.NativeAllocationRegistry;
 
diff --git a/core/java/android/os/HwParcel.java b/core/java/android/os/HwParcel.java
index 9786f16..fb36e6f 100644
--- a/core/java/android/os/HwParcel.java
+++ b/core/java/android/os/HwParcel.java
@@ -21,7 +21,7 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import dalvik.annotation.optimization.FastNative;
 
diff --git a/core/java/android/os/HwRemoteBinder.java b/core/java/android/os/HwRemoteBinder.java
index 72ec958..756202e 100644
--- a/core/java/android/os/HwRemoteBinder.java
+++ b/core/java/android/os/HwRemoteBinder.java
@@ -16,7 +16,8 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
+
 import libcore.util.NativeAllocationRegistry;
 
 /** @hide */
diff --git a/core/java/android/os/IBinder.java b/core/java/android/os/IBinder.java
index 83f88ad..d9ed327 100644
--- a/core/java/android/os/IBinder.java
+++ b/core/java/android/os/IBinder.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import java.io.FileDescriptor;
 
diff --git a/core/java/android/os/LocaleList.java b/core/java/android/os/LocaleList.java
index 0de09ef..0bf387e 100644
--- a/core/java/android/os/LocaleList.java
+++ b/core/java/android/os/LocaleList.java
@@ -20,7 +20,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.Size;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.icu.util.ULocale;
 
 import com.android.internal.annotations.GuardedBy;
diff --git a/core/java/android/os/Looper.java b/core/java/android/os/Looper.java
index d468972..5dc64d5 100644
--- a/core/java/android/os/Looper.java
+++ b/core/java/android/os/Looper.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.Log;
 import android.util.Printer;
 import android.util.Slog;
diff --git a/core/java/android/os/MemoryFile.java b/core/java/android/os/MemoryFile.java
index 5a1e3d4..f84f9f05 100644
--- a/core/java/android/os/MemoryFile.java
+++ b/core/java/android/os/MemoryFile.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.system.ErrnoException;
 
 import java.io.FileDescriptor;
diff --git a/core/java/android/os/Message.java b/core/java/android/os/Message.java
index 6055bef..8ac245b 100644
--- a/core/java/android/os/Message.java
+++ b/core/java/android/os/Message.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.TimeUtils;
 import android.util.proto.ProtoOutputStream;
 
diff --git a/core/java/android/os/MessageQueue.java b/core/java/android/os/MessageQueue.java
index f98fdc3..4e91057 100644
--- a/core/java/android/os/MessageQueue.java
+++ b/core/java/android/os/MessageQueue.java
@@ -19,8 +19,7 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
-import android.os.MessageQueueProto;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.Log;
 import android.util.Printer;
 import android.util.SparseArray;
diff --git a/core/java/android/os/Parcel.java b/core/java/android/os/Parcel.java
index 041f31d..382c838 100644
--- a/core/java/android/os/Parcel.java
+++ b/core/java/android/os/Parcel.java
@@ -19,7 +19,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.text.TextUtils;
 import android.util.ArrayMap;
 import android.util.ArraySet;
diff --git a/core/java/android/os/ParcelFileDescriptor.java b/core/java/android/os/ParcelFileDescriptor.java
index 2a4576a..214b3bb 100644
--- a/core/java/android/os/ParcelFileDescriptor.java
+++ b/core/java/android/os/ParcelFileDescriptor.java
@@ -32,7 +32,7 @@
 import static android.system.OsConstants.S_IWOTH;
 
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.ContentProvider;
 import android.os.MessageQueue.OnFileDescriptorEventListener;
diff --git a/core/java/android/os/ParcelUuid.java b/core/java/android/os/ParcelUuid.java
index cc50c89..0b52c75 100644
--- a/core/java/android/os/ParcelUuid.java
+++ b/core/java/android/os/ParcelUuid.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import java.util.UUID;
 
diff --git a/core/java/android/os/ParcelableParcel.java b/core/java/android/os/ParcelableParcel.java
index 61f3968..38d980e 100644
--- a/core/java/android/os/ParcelableParcel.java
+++ b/core/java/android/os/ParcelableParcel.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.MathUtils;
 
 /**
diff --git a/core/java/android/os/PerformanceCollector.java b/core/java/android/os/PerformanceCollector.java
index 33c86b8..27de48d 100644
--- a/core/java/android/os/PerformanceCollector.java
+++ b/core/java/android/os/PerformanceCollector.java
@@ -17,7 +17,8 @@
 package android.os;
 
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
+
 import java.util.ArrayList;
 
 /**
diff --git a/core/java/android/os/PowerManager.java b/core/java/android/os/PowerManager.java
index c618dbc..febc36c 100644
--- a/core/java/android/os/PowerManager.java
+++ b/core/java/android/os/PowerManager.java
@@ -26,7 +26,7 @@
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.service.dreams.Sandman;
 import android.util.ArrayMap;
diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index c94c74a..6f4f30c 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -19,7 +19,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.system.Os;
 import android.system.OsConstants;
 import android.webkit.WebViewZygote;
diff --git a/core/java/android/os/RecoverySystem.java b/core/java/android/os/RecoverySystem.java
index e3f6e12..1901820 100644
--- a/core/java/android/os/RecoverySystem.java
+++ b/core/java/android/os/RecoverySystem.java
@@ -22,8 +22,8 @@
 import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
-import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.ContentResolver;
 import android.content.Context;
diff --git a/core/java/android/os/Registrant.java b/core/java/android/os/Registrant.java
index 572b975..d6afd04 100644
--- a/core/java/android/os/Registrant.java
+++ b/core/java/android/os/Registrant.java
@@ -16,9 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
-import android.os.Handler;
-import android.os.Message;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import java.lang.ref.WeakReference;
 
diff --git a/core/java/android/os/RegistrantList.java b/core/java/android/os/RegistrantList.java
index 9c017df..98f949b 100644
--- a/core/java/android/os/RegistrantList.java
+++ b/core/java/android/os/RegistrantList.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import java.util.ArrayList;
 
diff --git a/core/java/android/os/RemoteCallback.java b/core/java/android/os/RemoteCallback.java
index da58d0f..373060f 100644
--- a/core/java/android/os/RemoteCallback.java
+++ b/core/java/android/os/RemoteCallback.java
@@ -20,8 +20,7 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-
-import dalvik.annotation.compat.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * @hide
diff --git a/core/java/android/os/RemoteCallbackList.java b/core/java/android/os/RemoteCallbackList.java
index 6165146..df4ade0 100644
--- a/core/java/android/os/RemoteCallbackList.java
+++ b/core/java/android/os/RemoteCallbackList.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.ArrayMap;
 import android.util.Slog;
 
diff --git a/core/java/android/os/RemoteException.java b/core/java/android/os/RemoteException.java
index 2e673a8..c2f7f1b 100644
--- a/core/java/android/os/RemoteException.java
+++ b/core/java/android/os/RemoteException.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.AndroidException;
 
 /**
diff --git a/core/java/android/os/SELinux.java b/core/java/android/os/SELinux.java
index 34809e7..f64a811 100644
--- a/core/java/android/os/SELinux.java
+++ b/core/java/android/os/SELinux.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.Slog;
 
 import java.io.File;
diff --git a/core/java/android/os/ServiceManager.java b/core/java/android/os/ServiceManager.java
index bf9225a..c008f4d 100644
--- a/core/java/android/os/ServiceManager.java
+++ b/core/java/android/os/ServiceManager.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.ArrayMap;
 import android.util.Log;
 
diff --git a/core/java/android/os/ServiceManagerNative.java b/core/java/android/os/ServiceManagerNative.java
index 94671c8..39ddcb2 100644
--- a/core/java/android/os/ServiceManagerNative.java
+++ b/core/java/android/os/ServiceManagerNative.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Native implementation of the service manager.  Most clients will only
diff --git a/core/java/android/os/SharedMemory.java b/core/java/android/os/SharedMemory.java
index 57a8801..26d9c7d 100644
--- a/core/java/android/os/SharedMemory.java
+++ b/core/java/android/os/SharedMemory.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.system.ErrnoException;
 import android.system.Os;
 import android.system.OsConstants;
diff --git a/core/java/android/os/ShellCommand.java b/core/java/android/os/ShellCommand.java
index 2fe8726..814aac4 100644
--- a/core/java/android/os/ShellCommand.java
+++ b/core/java/android/os/ShellCommand.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.Slog;
 
 import com.android.internal.util.FastPrintWriter;
diff --git a/core/java/android/os/StatFs.java b/core/java/android/os/StatFs.java
index 881d0b4..6d1a116 100644
--- a/core/java/android/os/StatFs.java
+++ b/core/java/android/os/StatFs.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.system.ErrnoException;
 import android.system.Os;
 import android.system.StructStatVfs;
diff --git a/core/java/android/os/StrictMode.java b/core/java/android/os/StrictMode.java
index 0bf634e..3faaff7 100644
--- a/core/java/android/os/StrictMode.java
+++ b/core/java/android/os/StrictMode.java
@@ -20,10 +20,10 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.app.ActivityThread;
 import android.app.IActivityManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/os/SystemClock.java b/core/java/android/os/SystemClock.java
index 210f5d7..29852a8 100644
--- a/core/java/android/os/SystemClock.java
+++ b/core/java/android/os/SystemClock.java
@@ -17,8 +17,8 @@
 package android.os;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
 import android.app.IAlarmManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.location.ILocationManager;
 import android.location.LocationTime;
diff --git a/core/java/android/os/SystemProperties.java b/core/java/android/os/SystemProperties.java
index f08e1ff..a681ec0 100644
--- a/core/java/android/os/SystemProperties.java
+++ b/core/java/android/os/SystemProperties.java
@@ -20,7 +20,7 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.Log;
 import android.util.MutableInt;
 
diff --git a/core/java/android/os/SystemService.java b/core/java/android/os/SystemService.java
index 968c761..5871d2d 100644
--- a/core/java/android/os/SystemService.java
+++ b/core/java/android/os/SystemService.java
@@ -16,9 +16,10 @@
 
 package android.os;
 
+import android.compat.annotation.UnsupportedAppUsage;
+
 import com.google.android.collect.Maps;
 
-import android.annotation.UnsupportedAppUsage;
 import java.util.HashMap;
 import java.util.concurrent.TimeoutException;
 
diff --git a/core/java/android/os/SystemVibrator.java b/core/java/android/os/SystemVibrator.java
index fbd11ca..f585c75 100644
--- a/core/java/android/os/SystemVibrator.java
+++ b/core/java/android/os/SystemVibrator.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.media.AudioAttributes;
 import android.util.Log;
diff --git a/core/java/android/os/Trace.java b/core/java/android/os/Trace.java
index e132c11..25584f1 100644
--- a/core/java/android/os/Trace.java
+++ b/core/java/android/os/Trace.java
@@ -17,9 +17,7 @@
 package android.os;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
-
-import com.android.internal.os.Zygote;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import dalvik.annotation.optimization.CriticalNative;
 import dalvik.annotation.optimization.FastNative;
diff --git a/core/java/android/os/UEventObserver.java b/core/java/android/os/UEventObserver.java
index dc98c42..fa30e50 100644
--- a/core/java/android/os/UEventObserver.java
+++ b/core/java/android/os/UEventObserver.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.Log;
 
 import java.util.ArrayList;
diff --git a/core/java/android/os/UpdateLock.java b/core/java/android/os/UpdateLock.java
index ea273ce..036d095 100644
--- a/core/java/android/os/UpdateLock.java
+++ b/core/java/android/os/UpdateLock.java
@@ -16,7 +16,7 @@
 
 package android.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.util.Log;
 
diff --git a/core/java/android/os/UserHandle.java b/core/java/android/os/UserHandle.java
index 45ee4ef..0ec8658 100644
--- a/core/java/android/os/UserHandle.java
+++ b/core/java/android/os/UserHandle.java
@@ -20,8 +20,8 @@
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.UserIdInt;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import java.io.PrintWriter;
 
diff --git a/core/java/android/os/UserManager.java b/core/java/android/os/UserManager.java
index c15618b..a507e25 100644
--- a/core/java/android/os/UserManager.java
+++ b/core/java/android/os/UserManager.java
@@ -25,12 +25,12 @@
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.UserIdInt;
 import android.annotation.WorkerThread;
 import android.app.Activity;
 import android.app.ActivityManager;
 import android.app.admin.DevicePolicyManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/os/VibrationEffect.java b/core/java/android/os/VibrationEffect.java
index 5769c34..75b4724 100644
--- a/core/java/android/os/VibrationEffect.java
+++ b/core/java/android/os/VibrationEffect.java
@@ -20,6 +20,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.hardware.vibrator.V1_0.EffectStrength;
@@ -27,8 +28,6 @@
 import android.net.Uri;
 import android.util.MathUtils;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.Arrays;
diff --git a/core/java/android/os/Vibrator.java b/core/java/android/os/Vibrator.java
index 6456d72..ccbb0f1 100644
--- a/core/java/android/os/Vibrator.java
+++ b/core/java/android/os/Vibrator.java
@@ -20,8 +20,8 @@
 import android.annotation.Nullable;
 import android.annotation.RequiresPermission;
 import android.annotation.SystemService;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityThread;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.media.AudioAttributes;
 import android.util.Log;
diff --git a/core/java/android/os/WorkSource.java b/core/java/android/os/WorkSource.java
index 825fc64..6846035 100644
--- a/core/java/android/os/WorkSource.java
+++ b/core/java/android/os/WorkSource.java
@@ -4,9 +4,8 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
-import android.os.WorkSourceProto;
 import android.provider.Settings;
 import android.provider.Settings.Global;
 import android.util.Log;
diff --git a/core/java/android/os/ZygoteProcess.java b/core/java/android/os/ZygoteProcess.java
index c2d3ecc..016823e 100644
--- a/core/java/android/os/ZygoteProcess.java
+++ b/core/java/android/os/ZygoteProcess.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ApplicationInfo;
 import android.net.LocalSocket;
 import android.net.LocalSocketAddress;
diff --git a/core/java/android/os/health/HealthStatsParceler.java b/core/java/android/os/health/HealthStatsParceler.java
index 384342c..f28a974 100644
--- a/core/java/android/os/health/HealthStatsParceler.java
+++ b/core/java/android/os/health/HealthStatsParceler.java
@@ -17,11 +17,10 @@
 package android.os.health;
 
 import android.annotation.TestApi;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 /**
  * Class to allow sending the HealthStats through aidl generated glue.
  *
diff --git a/core/java/android/os/health/SystemHealthManager.java b/core/java/android/os/health/SystemHealthManager.java
index a92e28a..6e259ea 100644
--- a/core/java/android/os/health/SystemHealthManager.java
+++ b/core/java/android/os/health/SystemHealthManager.java
@@ -17,14 +17,13 @@
 package android.os.health;
 
 import android.annotation.SystemService;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.BatteryStats;
 import android.os.Build;
 import android.os.Process;
 import android.os.RemoteException;
 import android.os.ServiceManager;
-import android.os.ServiceManager.ServiceNotFoundException;
 
 import com.android.internal.app.IBatteryStats;
 
diff --git a/core/java/android/os/storage/DiskInfo.java b/core/java/android/os/storage/DiskInfo.java
index b797324..df3c4d5 100644
--- a/core/java/android/os/storage/DiskInfo.java
+++ b/core/java/android/os/storage/DiskInfo.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.Resources;
 import android.os.Build;
 import android.os.Parcel;
diff --git a/core/java/android/os/storage/StorageEventListener.java b/core/java/android/os/storage/StorageEventListener.java
index 39d5b45..9fd9e4e 100644
--- a/core/java/android/os/storage/StorageEventListener.java
+++ b/core/java/android/os/storage/StorageEventListener.java
@@ -16,7 +16,7 @@
 
 package android.os.storage;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Used for receiving notifications from the StorageManager
diff --git a/core/java/android/os/storage/StorageManager.java b/core/java/android/os/storage/StorageManager.java
index 69c1295..c7709b9 100644
--- a/core/java/android/os/storage/StorageManager.java
+++ b/core/java/android/os/storage/StorageManager.java
@@ -40,12 +40,12 @@
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.WorkerThread;
 import android.app.Activity;
 import android.app.ActivityThread;
 import android.app.AppGlobals;
 import android.app.AppOpsManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/os/storage/StorageVolume.java b/core/java/android/os/storage/StorageVolume.java
index aefe843..05b45fa 100644
--- a/core/java/android/os/storage/StorageVolume.java
+++ b/core/java/android/os/storage/StorageVolume.java
@@ -19,7 +19,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
diff --git a/core/java/android/os/storage/VolumeInfo.java b/core/java/android/os/storage/VolumeInfo.java
index 7699a05..ff82982 100644
--- a/core/java/android/os/storage/VolumeInfo.java
+++ b/core/java/android/os/storage/VolumeInfo.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
diff --git a/core/java/android/os/storage/VolumeRecord.java b/core/java/android/os/storage/VolumeRecord.java
index 1a794eb..c497c8b 100644
--- a/core/java/android/os/storage/VolumeRecord.java
+++ b/core/java/android/os/storage/VolumeRecord.java
@@ -16,7 +16,7 @@
 
 package android.os.storage;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.DebugUtils;
diff --git a/core/java/android/preference/DialogPreference.java b/core/java/android/preference/DialogPreference.java
index 32511e9..dfdb57c4 100644
--- a/core/java/android/preference/DialogPreference.java
+++ b/core/java/android/preference/DialogPreference.java
@@ -21,9 +21,9 @@
 import android.annotation.DrawableRes;
 import android.annotation.Nullable;
 import android.annotation.StringRes;
-import android.annotation.UnsupportedAppUsage;
 import android.app.AlertDialog;
 import android.app.Dialog;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.SharedPreferences;
diff --git a/core/java/android/preference/EditTextPreference.java b/core/java/android/preference/EditTextPreference.java
index 74c5e3e..af6f184 100644
--- a/core/java/android/preference/EditTextPreference.java
+++ b/core/java/android/preference/EditTextPreference.java
@@ -17,7 +17,7 @@
 package android.preference;
 
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.res.TypedArray;
diff --git a/core/java/android/preference/ListPreference.java b/core/java/android/preference/ListPreference.java
index 830de525..0b64809 100644
--- a/core/java/android/preference/ListPreference.java
+++ b/core/java/android/preference/ListPreference.java
@@ -17,8 +17,8 @@
 package android.preference;
 
 import android.annotation.ArrayRes;
-import android.annotation.UnsupportedAppUsage;
 import android.app.AlertDialog.Builder;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.res.TypedArray;
diff --git a/core/java/android/preference/Preference.java b/core/java/android/preference/Preference.java
index e82e60d..f508dda 100644
--- a/core/java/android/preference/Preference.java
+++ b/core/java/android/preference/Preference.java
@@ -21,7 +21,7 @@
 import android.annotation.LayoutRes;
 import android.annotation.Nullable;
 import android.annotation.StringRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
diff --git a/core/java/android/preference/PreferenceActivity.java b/core/java/android/preference/PreferenceActivity.java
index 4750971..ae4a626 100644
--- a/core/java/android/preference/PreferenceActivity.java
+++ b/core/java/android/preference/PreferenceActivity.java
@@ -19,13 +19,13 @@
 import android.animation.LayoutTransition;
 import android.annotation.Nullable;
 import android.annotation.StringRes;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.XmlRes;
 import android.app.Fragment;
 import android.app.FragmentBreadCrumbs;
 import android.app.FragmentManager;
 import android.app.FragmentTransaction;
 import android.app.ListActivity;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
diff --git a/core/java/android/preference/PreferenceFragment.java b/core/java/android/preference/PreferenceFragment.java
index d6c069f0..3f6e505 100644
--- a/core/java/android/preference/PreferenceFragment.java
+++ b/core/java/android/preference/PreferenceFragment.java
@@ -17,10 +17,10 @@
 package android.preference;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.XmlRes;
 import android.app.Activity;
 import android.app.Fragment;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.TypedArray;
diff --git a/core/java/android/preference/PreferenceGroupAdapter.java b/core/java/android/preference/PreferenceGroupAdapter.java
index dcc5d4c..b263f50 100644
--- a/core/java/android/preference/PreferenceGroupAdapter.java
+++ b/core/java/android/preference/PreferenceGroupAdapter.java
@@ -16,7 +16,7 @@
 
 package android.preference;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.drawable.Drawable;
 import android.os.Handler;
 import android.preference.Preference.OnPreferenceChangeInternalListener;
diff --git a/core/java/android/preference/PreferenceManager.java b/core/java/android/preference/PreferenceManager.java
index f741bd6..9d3f349 100644
--- a/core/java/android/preference/PreferenceManager.java
+++ b/core/java/android/preference/PreferenceManager.java
@@ -18,9 +18,9 @@
 
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.XmlRes;
 import android.app.Activity;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
diff --git a/core/java/android/preference/PreferenceScreen.java b/core/java/android/preference/PreferenceScreen.java
index a353dbc..01fe2f3 100644
--- a/core/java/android/preference/PreferenceScreen.java
+++ b/core/java/android/preference/PreferenceScreen.java
@@ -16,8 +16,8 @@
 
 package android.preference;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.Dialog;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.res.TypedArray;
diff --git a/core/java/android/preference/RingtonePreference.java b/core/java/android/preference/RingtonePreference.java
index 025aad0..c6d8c08 100644
--- a/core/java/android/preference/RingtonePreference.java
+++ b/core/java/android/preference/RingtonePreference.java
@@ -16,7 +16,7 @@
 
 package android.preference;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.TypedArray;
diff --git a/core/java/android/preference/SeekBarDialogPreference.java b/core/java/android/preference/SeekBarDialogPreference.java
index 32ef821..46be122 100644
--- a/core/java/android/preference/SeekBarDialogPreference.java
+++ b/core/java/android/preference/SeekBarDialogPreference.java
@@ -16,7 +16,7 @@
 
 package android.preference;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
diff --git a/core/java/android/preference/SeekBarPreference.java b/core/java/android/preference/SeekBarPreference.java
index 99ab9db..a2852bc 100644
--- a/core/java/android/preference/SeekBarPreference.java
+++ b/core/java/android/preference/SeekBarPreference.java
@@ -16,7 +16,7 @@
 
 package android.preference;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.os.Parcel;
diff --git a/core/java/android/preference/SeekBarVolumizer.java b/core/java/android/preference/SeekBarVolumizer.java
index 2b3a2ab..5ff98f9 100644
--- a/core/java/android/preference/SeekBarVolumizer.java
+++ b/core/java/android/preference/SeekBarVolumizer.java
@@ -17,8 +17,8 @@
 package android.preference;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
 import android.app.NotificationManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/preference/SwitchPreference.java b/core/java/android/preference/SwitchPreference.java
index 9dea1c8..baa023e 100644
--- a/core/java/android/preference/SwitchPreference.java
+++ b/core/java/android/preference/SwitchPreference.java
@@ -17,7 +17,7 @@
 package android.preference;
 
 import android.annotation.StringRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.util.AttributeSet;
diff --git a/core/java/android/preference/TwoStatePreference.java b/core/java/android/preference/TwoStatePreference.java
index bb771d7..5eb5d17 100644
--- a/core/java/android/preference/TwoStatePreference.java
+++ b/core/java/android/preference/TwoStatePreference.java
@@ -17,7 +17,7 @@
 package android.preference;
 
 import android.annotation.StringRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.res.TypedArray;
diff --git a/core/java/android/preference/VolumePreference.java b/core/java/android/preference/VolumePreference.java
index a2d5a23..6eb524a 100644
--- a/core/java/android/preference/VolumePreference.java
+++ b/core/java/android/preference/VolumePreference.java
@@ -16,8 +16,8 @@
 
 package android.preference;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.Dialog;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.os.Parcel;
diff --git a/core/java/android/print/PrintDocumentAdapter.java b/core/java/android/print/PrintDocumentAdapter.java
index d1b6efc..7ea5655 100644
--- a/core/java/android/print/PrintDocumentAdapter.java
+++ b/core/java/android/print/PrintDocumentAdapter.java
@@ -16,7 +16,7 @@
 
 package android.print;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Bundle;
 import android.os.CancellationSignal;
 import android.os.ParcelFileDescriptor;
diff --git a/core/java/android/print/PrintJobInfo.java b/core/java/android/print/PrintJobInfo.java
index 25f383c..63f38f8 100644
--- a/core/java/android/print/PrintJobInfo.java
+++ b/core/java/android/print/PrintJobInfo.java
@@ -23,7 +23,7 @@
 import android.annotation.Nullable;
 import android.annotation.StringRes;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.PackageManager;
 import android.content.res.Resources;
 import android.os.Bundle;
diff --git a/core/java/android/print/PrintManager.java b/core/java/android/print/PrintManager.java
index e1ede93..9abce5d 100644
--- a/core/java/android/print/PrintManager.java
+++ b/core/java/android/print/PrintManager.java
@@ -22,9 +22,9 @@
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.Application.ActivityLifecycleCallbacks;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.IntentSender;
diff --git a/core/java/android/print/PrinterId.java b/core/java/android/print/PrinterId.java
index 42570c6..75ca750 100644
--- a/core/java/android/print/PrinterId.java
+++ b/core/java/android/print/PrinterId.java
@@ -17,7 +17,7 @@
 package android.print;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/core/java/android/provider/Browser.java b/core/java/android/provider/Browser.java
index 30021b4..afa7b80 100644
--- a/core/java/android/provider/Browser.java
+++ b/core/java/android/provider/Browser.java
@@ -16,10 +16,8 @@
 
 package android.provider;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ContentResolver;
-import android.content.ContentUris;
-import android.content.ContentValues;
 import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
@@ -30,8 +28,6 @@
 import android.provider.BrowserContract.Bookmarks;
 import android.provider.BrowserContract.Combined;
 import android.provider.BrowserContract.History;
-import android.provider.BrowserContract.Searches;
-import android.util.Log;
 import android.webkit.WebIconDatabase;
 
 public class Browser {
diff --git a/core/java/android/provider/BrowserContract.java b/core/java/android/provider/BrowserContract.java
index 57dde66..5083b8b2 100644
--- a/core/java/android/provider/BrowserContract.java
+++ b/core/java/android/provider/BrowserContract.java
@@ -17,7 +17,7 @@
 package android.provider;
 
 import android.accounts.Account;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ContentProviderClient;
 import android.content.ContentProviderOperation;
 import android.content.ContentResolver;
diff --git a/core/java/android/provider/CalendarContract.java b/core/java/android/provider/CalendarContract.java
index 7285166..9c6c92a 100644
--- a/core/java/android/provider/CalendarContract.java
+++ b/core/java/android/provider/CalendarContract.java
@@ -20,11 +20,11 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.AlarmManager;
 import android.app.PendingIntent;
 import android.app.admin.DevicePolicyManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.ContentProviderClient;
 import android.content.ContentResolver;
diff --git a/core/java/android/provider/CallLog.java b/core/java/android/provider/CallLog.java
index 391f3a2..9ffeff9 100644
--- a/core/java/android/provider/CallLog.java
+++ b/core/java/android/provider/CallLog.java
@@ -17,7 +17,7 @@
 
 package android.provider;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ContentProvider;
 import android.content.ContentResolver;
 import android.content.ContentValues;
diff --git a/core/java/android/provider/ContactsContract.java b/core/java/android/provider/ContactsContract.java
index f10e184..5247311 100644
--- a/core/java/android/provider/ContactsContract.java
+++ b/core/java/android/provider/ContactsContract.java
@@ -21,8 +21,8 @@
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
 import android.content.ContentProviderClient;
diff --git a/core/java/android/provider/ContactsInternal.java b/core/java/android/provider/ContactsInternal.java
index 69c4b9b..aa2a89c 100644
--- a/core/java/android/provider/ContactsInternal.java
+++ b/core/java/android/provider/ContactsInternal.java
@@ -15,15 +15,14 @@
  */
 package android.provider;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.admin.DevicePolicyManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ActivityNotFoundException;
 import android.content.ContentUris;
 import android.content.Context;
 import android.content.Intent;
 import android.content.UriMatcher;
 import android.net.Uri;
-import android.os.Process;
 import android.os.UserHandle;
 import android.text.TextUtils;
 import android.widget.Toast;
diff --git a/core/java/android/provider/DocumentsContract.java b/core/java/android/provider/DocumentsContract.java
index fd81178..4bbd213 100644
--- a/core/java/android/provider/DocumentsContract.java
+++ b/core/java/android/provider/DocumentsContract.java
@@ -22,7 +22,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ContentInterface;
 import android.content.ContentResolver;
 import android.content.Context;
diff --git a/core/java/android/provider/Downloads.java b/core/java/android/provider/Downloads.java
index 9a384c6..48410a7 100644
--- a/core/java/android/provider/Downloads.java
+++ b/core/java/android/provider/Downloads.java
@@ -16,8 +16,8 @@
 
 package android.provider;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.DownloadManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.net.NetworkPolicyManager;
 import android.net.Uri;
diff --git a/core/java/android/provider/MediaStore.java b/core/java/android/provider/MediaStore.java
index 2299aad..f6cf1d2 100644
--- a/core/java/android/provider/MediaStore.java
+++ b/core/java/android/provider/MediaStore.java
@@ -27,9 +27,9 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.AppGlobals;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ClipData;
 import android.content.ContentProviderClient;
 import android.content.ContentResolver;
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index c7e7145..1f3ae09 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -37,7 +37,6 @@
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.UserIdInt;
 import android.app.ActivityThread;
 import android.app.AppOpsManager;
@@ -46,6 +45,7 @@
 import android.app.NotificationManager;
 import android.app.SearchManager;
 import android.app.WallpaperManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.ContentResolver;
 import android.content.ContentValues;
diff --git a/core/java/android/provider/Telephony.java b/core/java/android/provider/Telephony.java
index 13d167d..28d31e1 100644
--- a/core/java/android/provider/Telephony.java
+++ b/core/java/android/provider/Telephony.java
@@ -24,7 +24,7 @@
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.ContentResolver;
 import android.content.ContentValues;
diff --git a/core/java/android/security/KeystoreArguments.java b/core/java/android/security/KeystoreArguments.java
index e634234..a59c4e0 100644
--- a/core/java/android/security/KeystoreArguments.java
+++ b/core/java/android/security/KeystoreArguments.java
@@ -16,7 +16,7 @@
 
 package android.security;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/security/keymaster/ExportResult.java b/core/java/android/security/keymaster/ExportResult.java
index 1be5ae9..037b852 100644
--- a/core/java/android/security/keymaster/ExportResult.java
+++ b/core/java/android/security/keymaster/ExportResult.java
@@ -16,7 +16,7 @@
 
 package android.security.keymaster;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/security/keymaster/KeyCharacteristics.java b/core/java/android/security/keymaster/KeyCharacteristics.java
index 2eb2cef..d8382fa 100644
--- a/core/java/android/security/keymaster/KeyCharacteristics.java
+++ b/core/java/android/security/keymaster/KeyCharacteristics.java
@@ -16,7 +16,7 @@
 
 package android.security.keymaster;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/security/keymaster/KeymasterArguments.java b/core/java/android/security/keymaster/KeymasterArguments.java
index d2dbdec..e009e12 100644
--- a/core/java/android/security/keymaster/KeymasterArguments.java
+++ b/core/java/android/security/keymaster/KeymasterArguments.java
@@ -16,7 +16,7 @@
 
 package android.security.keymaster;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/security/keymaster/KeymasterBlob.java b/core/java/android/security/keymaster/KeymasterBlob.java
index 6a2024f..68365bf 100644
--- a/core/java/android/security/keymaster/KeymasterBlob.java
+++ b/core/java/android/security/keymaster/KeymasterBlob.java
@@ -16,7 +16,7 @@
 
 package android.security.keymaster;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/security/keymaster/KeymasterBlobArgument.java b/core/java/android/security/keymaster/KeymasterBlobArgument.java
index fc562bd..81b08c5 100644
--- a/core/java/android/security/keymaster/KeymasterBlobArgument.java
+++ b/core/java/android/security/keymaster/KeymasterBlobArgument.java
@@ -16,7 +16,7 @@
 
 package android.security.keymaster;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 
 /**
diff --git a/core/java/android/security/keymaster/KeymasterBooleanArgument.java b/core/java/android/security/keymaster/KeymasterBooleanArgument.java
index 4286aa0..25b2ac4 100644
--- a/core/java/android/security/keymaster/KeymasterBooleanArgument.java
+++ b/core/java/android/security/keymaster/KeymasterBooleanArgument.java
@@ -16,7 +16,7 @@
 
 package android.security.keymaster;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 
 /**
diff --git a/core/java/android/security/keymaster/KeymasterDateArgument.java b/core/java/android/security/keymaster/KeymasterDateArgument.java
index 3e04c15..218f488 100644
--- a/core/java/android/security/keymaster/KeymasterDateArgument.java
+++ b/core/java/android/security/keymaster/KeymasterDateArgument.java
@@ -16,8 +16,9 @@
 
 package android.security.keymaster;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
+
 import java.util.Date;
 
 /**
diff --git a/core/java/android/security/keymaster/KeymasterIntArgument.java b/core/java/android/security/keymaster/KeymasterIntArgument.java
index 4aadce4..01d38c7 100644
--- a/core/java/android/security/keymaster/KeymasterIntArgument.java
+++ b/core/java/android/security/keymaster/KeymasterIntArgument.java
@@ -16,7 +16,7 @@
 
 package android.security.keymaster;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 
 /**
diff --git a/core/java/android/security/keymaster/KeymasterLongArgument.java b/core/java/android/security/keymaster/KeymasterLongArgument.java
index bc2255e..3ac27cc 100644
--- a/core/java/android/security/keymaster/KeymasterLongArgument.java
+++ b/core/java/android/security/keymaster/KeymasterLongArgument.java
@@ -16,7 +16,7 @@
 
 package android.security.keymaster;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 
 /**
diff --git a/core/java/android/security/keymaster/OperationResult.java b/core/java/android/security/keymaster/OperationResult.java
index c278eb3..b4e155a 100644
--- a/core/java/android/security/keymaster/OperationResult.java
+++ b/core/java/android/security/keymaster/OperationResult.java
@@ -16,7 +16,7 @@
 
 package android.security.keymaster;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.IBinder;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/core/java/android/security/net/config/RootTrustManager.java b/core/java/android/security/net/config/RootTrustManager.java
index d8936d9..58dc4ba 100644
--- a/core/java/android/security/net/config/RootTrustManager.java
+++ b/core/java/android/security/net/config/RootTrustManager.java
@@ -16,15 +16,16 @@
 
 package android.security.net.config;
 
+import android.compat.annotation.UnsupportedAppUsage;
+
 import java.net.Socket;
 import java.security.cert.CertificateException;
 import java.security.cert.X509Certificate;
 import java.util.List;
 
-import android.annotation.UnsupportedAppUsage;
-import javax.net.ssl.SSLSocket;
 import javax.net.ssl.SSLEngine;
 import javax.net.ssl.SSLSession;
+import javax.net.ssl.SSLSocket;
 import javax.net.ssl.X509ExtendedTrustManager;
 
 /**
diff --git a/core/java/android/service/dreams/DreamService.java b/core/java/android/service/dreams/DreamService.java
index 38de794..de4a551 100644
--- a/core/java/android/service/dreams/DreamService.java
+++ b/core/java/android/service/dreams/DreamService.java
@@ -21,9 +21,9 @@
 import android.annotation.Nullable;
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
-import android.annotation.UnsupportedAppUsage;
 import android.app.AlarmManager;
 import android.app.Service;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.graphics.PixelFormat;
 import android.graphics.drawable.ColorDrawable;
diff --git a/core/java/android/service/notification/NotificationListenerService.java b/core/java/android/service/notification/NotificationListenerService.java
index b44c9d5..5da34a3 100644
--- a/core/java/android/service/notification/NotificationListenerService.java
+++ b/core/java/android/service/notification/NotificationListenerService.java
@@ -22,7 +22,6 @@
 import android.annotation.SdkConstant;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.app.INotificationManager;
 import android.app.Notification;
@@ -33,6 +32,7 @@
 import android.app.Person;
 import android.app.Service;
 import android.companion.CompanionDeviceManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/service/notification/StatusBarNotification.java b/core/java/android/service/notification/StatusBarNotification.java
index 905c781..d8ea971 100644
--- a/core/java/android/service/notification/StatusBarNotification.java
+++ b/core/java/android/service/notification/StatusBarNotification.java
@@ -17,10 +17,10 @@
 package android.service.notification;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.Person;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
diff --git a/core/java/android/service/notification/ZenModeConfig.java b/core/java/android/service/notification/ZenModeConfig.java
index 93bcdbf..9e7af1f 100644
--- a/core/java/android/service/notification/ZenModeConfig.java
+++ b/core/java/android/service/notification/ZenModeConfig.java
@@ -20,11 +20,11 @@
 import static android.app.NotificationManager.Policy.SUPPRESSED_EFFECT_LIGHTS;
 import static android.app.NotificationManager.Policy.SUPPRESSED_EFFECT_PEEK;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.app.AlarmManager;
 import android.app.NotificationManager;
 import android.app.NotificationManager.Policy;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
diff --git a/core/java/android/service/voice/AlwaysOnHotwordDetector.java b/core/java/android/service/voice/AlwaysOnHotwordDetector.java
index bd953ca..e6b1922 100644
--- a/core/java/android/service/voice/AlwaysOnHotwordDetector.java
+++ b/core/java/android/service/voice/AlwaysOnHotwordDetector.java
@@ -19,8 +19,8 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.hardware.soundtrigger.IRecognitionStatusCallback;
 import android.hardware.soundtrigger.KeyphraseEnrollmentInfo;
@@ -32,7 +32,6 @@
 import android.hardware.soundtrigger.SoundTrigger.KeyphraseSoundModel;
 import android.hardware.soundtrigger.SoundTrigger.ModuleProperties;
 import android.hardware.soundtrigger.SoundTrigger.RecognitionConfig;
-import android.hardware.soundtrigger.SoundTrigger.RecognitionEvent;
 import android.media.AudioFormat;
 import android.os.AsyncTask;
 import android.os.Handler;
diff --git a/core/java/android/service/voice/VoiceInteractionService.java b/core/java/android/service/voice/VoiceInteractionService.java
index 0de17ca..36e057f 100644
--- a/core/java/android/service/voice/VoiceInteractionService.java
+++ b/core/java/android/service/voice/VoiceInteractionService.java
@@ -18,8 +18,8 @@
 
 import android.annotation.NonNull;
 import android.annotation.SdkConstant;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Service;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/service/vr/VrListenerService.java b/core/java/android/service/vr/VrListenerService.java
index 3c38495..2758ace 100644
--- a/core/java/android/service/vr/VrListenerService.java
+++ b/core/java/android/service/vr/VrListenerService.java
@@ -18,9 +18,9 @@
 
 import android.annotation.NonNull;
 import android.annotation.SdkConstant;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.app.Service;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/service/wallpaper/Android.bp b/core/java/android/service/wallpaper/Android.bp
index aa6123f..ffbdb03 100644
--- a/core/java/android/service/wallpaper/Android.bp
+++ b/core/java/android/service/wallpaper/Android.bp
@@ -6,6 +6,8 @@
         "I*.aidl",
     ],
 
+    libs: ["unsupportedappusage"],
+
     // Enforce that the library is built against java 8 so that there are
     // no compatibility issues with launcher
     java_version: "1.8",
diff --git a/core/java/android/service/wallpaper/WallpaperService.java b/core/java/android/service/wallpaper/WallpaperService.java
index d645e3f..3cb3ec3 100644
--- a/core/java/android/service/wallpaper/WallpaperService.java
+++ b/core/java/android/service/wallpaper/WallpaperService.java
@@ -20,11 +20,11 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Service;
 import android.app.WallpaperColors;
 import android.app.WallpaperInfo;
 import android.app.WallpaperManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.TypedArray;
diff --git a/core/java/android/speech/tts/TextToSpeech.java b/core/java/android/speech/tts/TextToSpeech.java
index 100774c..f3650d6 100644
--- a/core/java/android/speech/tts/TextToSpeech.java
+++ b/core/java/android/speech/tts/TextToSpeech.java
@@ -20,7 +20,7 @@
 import android.annotation.RawRes;
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.ContentResolver;
 import android.content.Context;
diff --git a/core/java/android/speech/tts/TtsEngines.java b/core/java/android/speech/tts/TtsEngines.java
index 2fab404..a8aea7c 100644
--- a/core/java/android/speech/tts/TtsEngines.java
+++ b/core/java/android/speech/tts/TtsEngines.java
@@ -18,7 +18,7 @@
 import static android.provider.Settings.Secure.getString;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ApplicationInfo;
diff --git a/core/java/android/telephony/PhoneStateListener.java b/core/java/android/telephony/PhoneStateListener.java
index 7841f99..26ed5c9 100644
--- a/core/java/android/telephony/PhoneStateListener.java
+++ b/core/java/android/telephony/PhoneStateListener.java
@@ -21,7 +21,7 @@
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Binder;
 import android.os.Build;
 import android.os.Handler;
diff --git a/core/java/android/telephony/Rlog.java b/core/java/android/telephony/Rlog.java
index cdab2dc..2afdd33 100644
--- a/core/java/android/telephony/Rlog.java
+++ b/core/java/android/telephony/Rlog.java
@@ -16,12 +16,11 @@
 
 package android.telephony;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.text.TextUtils;
-import android.util.Log;
-
-import android.annotation.UnsupportedAppUsage;
 import android.util.Base64;
+import android.util.Log;
 
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
diff --git a/core/java/android/text/AndroidBidi.java b/core/java/android/text/AndroidBidi.java
index bb7fb44..f1e2181 100644
--- a/core/java/android/text/AndroidBidi.java
+++ b/core/java/android/text/AndroidBidi.java
@@ -16,7 +16,7 @@
 
 package android.text;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.icu.lang.UCharacter;
 import android.icu.lang.UCharacterDirection;
 import android.icu.lang.UProperty;
diff --git a/core/java/android/text/BoringLayout.java b/core/java/android/text/BoringLayout.java
index cf6987c..3ee1a90 100644
--- a/core/java/android/text/BoringLayout.java
+++ b/core/java/android/text/BoringLayout.java
@@ -16,7 +16,7 @@
 
 package android.text;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Path;
diff --git a/core/java/android/text/DynamicLayout.java b/core/java/android/text/DynamicLayout.java
index 32982f9..c60d446 100644
--- a/core/java/android/text/DynamicLayout.java
+++ b/core/java/android/text/DynamicLayout.java
@@ -20,7 +20,7 @@
 import android.annotation.IntRange;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Paint;
 import android.graphics.Rect;
 import android.os.Build;
diff --git a/core/java/android/text/FontConfig.java b/core/java/android/text/FontConfig.java
index 19c55d5..b5688a4 100644
--- a/core/java/android/text/FontConfig.java
+++ b/core/java/android/text/FontConfig.java
@@ -21,7 +21,7 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.fonts.FontVariationAxis;
 import android.net.Uri;
 
diff --git a/core/java/android/text/Html.java b/core/java/android/text/Html.java
index 18f8db2..55af087 100644
--- a/core/java/android/text/Html.java
+++ b/core/java/android/text/Html.java
@@ -16,9 +16,9 @@
 
 package android.text;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityThread;
 import android.app.Application;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.Resources;
 import android.graphics.Color;
 import android.graphics.Typeface;
diff --git a/core/java/android/text/InputFilter.java b/core/java/android/text/InputFilter.java
index a9a7b2f..96e7bd0 100644
--- a/core/java/android/text/InputFilter.java
+++ b/core/java/android/text/InputFilter.java
@@ -17,7 +17,7 @@
 package android.text;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.util.Preconditions;
 
diff --git a/core/java/android/text/Layout.java b/core/java/android/text/Layout.java
index 2c2c295..8a4497a 100644
--- a/core/java/android/text/Layout.java
+++ b/core/java/android/text/Layout.java
@@ -18,7 +18,7 @@
 
 import android.annotation.IntDef;
 import android.annotation.IntRange;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Path;
diff --git a/core/java/android/text/Selection.java b/core/java/android/text/Selection.java
index 68199a4..57c1d23 100644
--- a/core/java/android/text/Selection.java
+++ b/core/java/android/text/Selection.java
@@ -17,7 +17,7 @@
 package android.text;
 
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import java.text.BreakIterator;
 
diff --git a/core/java/android/text/SpanSet.java b/core/java/android/text/SpanSet.java
index 362825a..81bdd65 100644
--- a/core/java/android/text/SpanSet.java
+++ b/core/java/android/text/SpanSet.java
@@ -16,7 +16,8 @@
 
 package android.text;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
+
 import java.lang.reflect.Array;
 import java.util.Arrays;
 
diff --git a/core/java/android/text/SpannableStringBuilder.java b/core/java/android/text/SpannableStringBuilder.java
index 0d29da0..ac27e3d 100644
--- a/core/java/android/text/SpannableStringBuilder.java
+++ b/core/java/android/text/SpannableStringBuilder.java
@@ -17,7 +17,7 @@
 package android.text;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.BaseCanvas;
 import android.graphics.Paint;
 import android.util.Log;
diff --git a/core/java/android/text/SpannableStringInternal.java b/core/java/android/text/SpannableStringInternal.java
index a986633..b85ef76 100644
--- a/core/java/android/text/SpannableStringInternal.java
+++ b/core/java/android/text/SpannableStringInternal.java
@@ -16,7 +16,7 @@
 
 package android.text;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.GrowingArrayUtils;
diff --git a/core/java/android/text/StaticLayout.java b/core/java/android/text/StaticLayout.java
index 69cfc03..85e2d98 100644
--- a/core/java/android/text/StaticLayout.java
+++ b/core/java/android/text/StaticLayout.java
@@ -20,7 +20,7 @@
 import android.annotation.IntRange;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Paint;
 import android.graphics.text.LineBreaker;
 import android.os.Build;
diff --git a/core/java/android/text/TextLine.java b/core/java/android/text/TextLine.java
index 1c50d73..3c51fa7 100644
--- a/core/java/android/text/TextLine.java
+++ b/core/java/android/text/TextLine.java
@@ -19,7 +19,7 @@
 import android.annotation.IntRange;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Paint.FontMetricsInt;
diff --git a/core/java/android/text/TextPaint.java b/core/java/android/text/TextPaint.java
index d5aad33..73825b1 100644
--- a/core/java/android/text/TextPaint.java
+++ b/core/java/android/text/TextPaint.java
@@ -18,7 +18,7 @@
 
 import android.annotation.ColorInt;
 import android.annotation.Px;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Paint;
 
 /**
diff --git a/core/java/android/text/TextUtils.java b/core/java/android/text/TextUtils.java
index 81643e9..788d98b 100644
--- a/core/java/android/text/TextUtils.java
+++ b/core/java/android/text/TextUtils.java
@@ -24,7 +24,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.PluralsRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Resources;
 import android.icu.lang.UCharacter;
diff --git a/core/java/android/text/format/DateFormat.java b/core/java/android/text/format/DateFormat.java
index 3c8de94..0863a81 100755
--- a/core/java/android/text/format/DateFormat.java
+++ b/core/java/android/text/format/DateFormat.java
@@ -17,9 +17,8 @@
 package android.text.format;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
-import android.os.UserHandle;
 import android.provider.Settings;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
diff --git a/core/java/android/text/format/DateUtils.java b/core/java/android/text/format/DateUtils.java
index 90625183..f236f19 100644
--- a/core/java/android/text/format/DateUtils.java
+++ b/core/java/android/text/format/DateUtils.java
@@ -16,7 +16,7 @@
 
 package android.text.format;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
diff --git a/core/java/android/text/format/Formatter.java b/core/java/android/text/format/Formatter.java
index d7baa10..17d3ae4 100644
--- a/core/java/android/text/format/Formatter.java
+++ b/core/java/android/text/format/Formatter.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Resources;
 import android.icu.text.MeasureFormat;
diff --git a/core/java/android/text/method/AllCapsTransformationMethod.java b/core/java/android/text/method/AllCapsTransformationMethod.java
index 5a7c98d..305b056 100644
--- a/core/java/android/text/method/AllCapsTransformationMethod.java
+++ b/core/java/android/text/method/AllCapsTransformationMethod.java
@@ -17,7 +17,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.graphics.Rect;
 import android.text.Spanned;
diff --git a/core/java/android/text/method/HideReturnsTransformationMethod.java b/core/java/android/text/method/HideReturnsTransformationMethod.java
index 440a4b1..40ce871 100644
--- a/core/java/android/text/method/HideReturnsTransformationMethod.java
+++ b/core/java/android/text/method/HideReturnsTransformationMethod.java
@@ -16,7 +16,7 @@
 
 package android.text.method;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 
 /**
diff --git a/core/java/android/text/method/LinkMovementMethod.java b/core/java/android/text/method/LinkMovementMethod.java
index a0c44a8..c544c41 100644
--- a/core/java/android/text/method/LinkMovementMethod.java
+++ b/core/java/android/text/method/LinkMovementMethod.java
@@ -16,7 +16,7 @@
 
 package android.text.method;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.text.Layout;
 import android.text.NoCopySpan;
diff --git a/core/java/android/text/method/MetaKeyKeyListener.java b/core/java/android/text/method/MetaKeyKeyListener.java
index ec7ed34b..d1d7c96 100644
--- a/core/java/android/text/method/MetaKeyKeyListener.java
+++ b/core/java/android/text/method/MetaKeyKeyListener.java
@@ -16,7 +16,7 @@
 
 package android.text.method;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.text.Editable;
 import android.text.NoCopySpan;
 import android.text.Spannable;
diff --git a/core/java/android/text/method/PasswordTransformationMethod.java b/core/java/android/text/method/PasswordTransformationMethod.java
index c96fc5d..53553be 100644
--- a/core/java/android/text/method/PasswordTransformationMethod.java
+++ b/core/java/android/text/method/PasswordTransformationMethod.java
@@ -16,7 +16,7 @@
 
 package android.text.method;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Rect;
 import android.os.Build;
 import android.os.Handler;
diff --git a/core/java/android/text/method/TransformationMethod2.java b/core/java/android/text/method/TransformationMethod2.java
index 0bf401a..8d5ec24 100644
--- a/core/java/android/text/method/TransformationMethod2.java
+++ b/core/java/android/text/method/TransformationMethod2.java
@@ -15,7 +15,7 @@
  */
 package android.text.method;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * TransformationMethod2 extends the TransformationMethod interface
diff --git a/core/java/android/text/method/WordIterator.java b/core/java/android/text/method/WordIterator.java
index 313567a..d766186 100644
--- a/core/java/android/text/method/WordIterator.java
+++ b/core/java/android/text/method/WordIterator.java
@@ -17,7 +17,7 @@
 package android.text.method;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.icu.lang.UCharacter;
 import android.icu.lang.UProperty;
 import android.icu.text.BreakIterator;
diff --git a/core/java/android/text/style/BulletSpan.java b/core/java/android/text/style/BulletSpan.java
index 9b1dfbf..ad61788 100644
--- a/core/java/android/text/style/BulletSpan.java
+++ b/core/java/android/text/style/BulletSpan.java
@@ -21,7 +21,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.Px;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.os.Build;
diff --git a/core/java/android/text/style/DynamicDrawableSpan.java b/core/java/android/text/style/DynamicDrawableSpan.java
index 1a508a1..f37e423 100644
--- a/core/java/android/text/style/DynamicDrawableSpan.java
+++ b/core/java/android/text/style/DynamicDrawableSpan.java
@@ -22,7 +22,7 @@
 import android.annotation.IntRange;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Rect;
diff --git a/core/java/android/text/style/EasyEditSpan.java b/core/java/android/text/style/EasyEditSpan.java
index bfb2873..b23c2b7 100644
--- a/core/java/android/text/style/EasyEditSpan.java
+++ b/core/java/android/text/style/EasyEditSpan.java
@@ -17,8 +17,8 @@
 package android.text.style;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.text.ParcelableSpan;
 import android.text.TextUtils;
diff --git a/core/java/android/text/style/ImageSpan.java b/core/java/android/text/style/ImageSpan.java
index 98f58be..ec55aeb 100644
--- a/core/java/android/text/style/ImageSpan.java
+++ b/core/java/android/text/style/ImageSpan.java
@@ -19,7 +19,7 @@
 import android.annotation.DrawableRes;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
diff --git a/core/java/android/text/style/SpellCheckSpan.java b/core/java/android/text/style/SpellCheckSpan.java
index 6ffde38..e8ec3c6 100644
--- a/core/java/android/text/style/SpellCheckSpan.java
+++ b/core/java/android/text/style/SpellCheckSpan.java
@@ -16,7 +16,7 @@
 
 package android.text.style;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.text.ParcelableSpan;
 import android.text.TextUtils;
diff --git a/core/java/android/text/style/SuggestionRangeSpan.java b/core/java/android/text/style/SuggestionRangeSpan.java
index d958dde..2b04a7a 100644
--- a/core/java/android/text/style/SuggestionRangeSpan.java
+++ b/core/java/android/text/style/SuggestionRangeSpan.java
@@ -16,7 +16,7 @@
 
 package android.text.style;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.text.ParcelableSpan;
 import android.text.TextPaint;
diff --git a/core/java/android/text/style/SuggestionSpan.java b/core/java/android/text/style/SuggestionSpan.java
index c000ae3..be01bfb 100644
--- a/core/java/android/text/style/SuggestionSpan.java
+++ b/core/java/android/text/style/SuggestionSpan.java
@@ -19,7 +19,7 @@
 import android.annotation.ColorInt;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Color;
diff --git a/core/java/android/text/util/Linkify.java b/core/java/android/text/util/Linkify.java
index df54209..6931a32 100644
--- a/core/java/android/text/util/Linkify.java
+++ b/core/java/android/text/util/Linkify.java
@@ -19,7 +19,7 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.telephony.PhoneNumberUtils;
 import android.telephony.TelephonyManager;
diff --git a/core/java/android/transition/ChangeBounds.java b/core/java/android/transition/ChangeBounds.java
index de182da..59a05ac 100644
--- a/core/java/android/transition/ChangeBounds.java
+++ b/core/java/android/transition/ChangeBounds.java
@@ -22,7 +22,7 @@
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
 import android.animation.RectEvaluator;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Bitmap;
diff --git a/core/java/android/transition/Scene.java b/core/java/android/transition/Scene.java
index 8d4db54..52a97e3 100644
--- a/core/java/android/transition/Scene.java
+++ b/core/java/android/transition/Scene.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Build;
 import android.util.SparseArray;
diff --git a/core/java/android/transition/Transition.java b/core/java/android/transition/Transition.java
index 0feab4d..e511584 100644
--- a/core/java/android/transition/Transition.java
+++ b/core/java/android/transition/Transition.java
@@ -20,7 +20,7 @@
 import android.animation.AnimatorListenerAdapter;
 import android.animation.TimeInterpolator;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Path;
diff --git a/core/java/android/transition/TransitionManager.java b/core/java/android/transition/TransitionManager.java
index 0e5252e..1b0612e 100644
--- a/core/java/android/transition/TransitionManager.java
+++ b/core/java/android/transition/TransitionManager.java
@@ -17,7 +17,7 @@
 package android.transition;
 
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.util.ArrayMap;
 import android.util.Log;
diff --git a/core/java/android/util/ArrayMap.java b/core/java/android/util/ArrayMap.java
index d899dde..5643d5a 100644
--- a/core/java/android/util/ArrayMap.java
+++ b/core/java/android/util/ArrayMap.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.util.ArrayUtils;
 
diff --git a/core/java/android/util/ArraySet.java b/core/java/android/util/ArraySet.java
index d6a35e1..489d579 100644
--- a/core/java/android/util/ArraySet.java
+++ b/core/java/android/util/ArraySet.java
@@ -18,7 +18,7 @@
 
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import libcore.util.EmptyArray;
 
diff --git a/core/java/android/util/Base64.java b/core/java/android/util/Base64.java
index ecc0c9c..92abd7c 100644
--- a/core/java/android/util/Base64.java
+++ b/core/java/android/util/Base64.java
@@ -16,7 +16,8 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
+
 import java.io.UnsupportedEncodingException;
 
 /**
diff --git a/core/java/android/util/Base64OutputStream.java b/core/java/android/util/Base64OutputStream.java
index 230a3a5..48fadeb 100644
--- a/core/java/android/util/Base64OutputStream.java
+++ b/core/java/android/util/Base64OutputStream.java
@@ -16,7 +16,8 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
+
 import java.io.FilterOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
diff --git a/core/java/android/util/DebugUtils.java b/core/java/android/util/DebugUtils.java
index 55d114b..1b4905a 100644
--- a/core/java/android/util/DebugUtils.java
+++ b/core/java/android/util/DebugUtils.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 
 import java.io.PrintWriter;
diff --git a/core/java/android/util/DisplayMetrics.java b/core/java/android/util/DisplayMetrics.java
index 7c7223c..4c08b59 100755
--- a/core/java/android/util/DisplayMetrics.java
+++ b/core/java/android/util/DisplayMetrics.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.SystemProperties;
 
 
diff --git a/core/java/android/util/EventLog.java b/core/java/android/util/EventLog.java
index 65d825a..c9dc05b 100644
--- a/core/java/android/util/EventLog.java
+++ b/core/java/android/util/EventLog.java
@@ -17,7 +17,7 @@
 package android.util;
 
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import java.io.BufferedReader;
 import java.io.FileReader;
diff --git a/core/java/android/util/IconDrawableFactory.java b/core/java/android/util/IconDrawableFactory.java
index d90b65e..be10d94 100644
--- a/core/java/android/util/IconDrawableFactory.java
+++ b/core/java/android/util/IconDrawableFactory.java
@@ -15,8 +15,8 @@
  */
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.UserIdInt;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageItemInfo;
diff --git a/core/java/android/util/LocalLog.java b/core/java/android/util/LocalLog.java
index 0203430..63fe61f 100644
--- a/core/java/android/util/LocalLog.java
+++ b/core/java/android/util/LocalLog.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.SystemClock;
 
 import java.io.FileDescriptor;
diff --git a/core/java/android/util/Log.java b/core/java/android/util/Log.java
index 0dd7338..3077b79 100644
--- a/core/java/android/util/Log.java
+++ b/core/java/android/util/Log.java
@@ -19,7 +19,7 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.DeadSystemException;
 
 import com.android.internal.os.RuntimeInit;
diff --git a/core/java/android/util/LogWriter.java b/core/java/android/util/LogWriter.java
index b062ace..a674ae1 100644
--- a/core/java/android/util/LogWriter.java
+++ b/core/java/android/util/LogWriter.java
@@ -16,7 +16,8 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
+
 import java.io.Writer;
 
 /** @hide */
diff --git a/core/java/android/util/LongArray.java b/core/java/android/util/LongArray.java
index 6f4aa52..93bcd6b 100644
--- a/core/java/android/util/LongArray.java
+++ b/core/java/android/util/LongArray.java
@@ -17,7 +17,7 @@
 package android.util;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.Preconditions;
diff --git a/core/java/android/util/LongSparseLongArray.java b/core/java/android/util/LongSparseLongArray.java
index 7b7eea0..75f4135 100644
--- a/core/java/android/util/LongSparseLongArray.java
+++ b/core/java/android/util/LongSparseLongArray.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.GrowingArrayUtils;
diff --git a/core/java/android/util/LruCache.java b/core/java/android/util/LruCache.java
index f04e7cb..d35c82b 100644
--- a/core/java/android/util/LruCache.java
+++ b/core/java/android/util/LruCache.java
@@ -16,7 +16,8 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
+
 import java.util.LinkedHashMap;
 import java.util.Map;
 
diff --git a/core/java/android/util/MathUtils.java b/core/java/android/util/MathUtils.java
index 0eeef70..971e161 100644
--- a/core/java/android/util/MathUtils.java
+++ b/core/java/android/util/MathUtils.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Rect;
 
 /**
diff --git a/core/java/android/util/NtpTrustedTime.java b/core/java/android/util/NtpTrustedTime.java
index 1b951a5..fa994ba 100644
--- a/core/java/android/util/NtpTrustedTime.java
+++ b/core/java/android/util/NtpTrustedTime.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.res.Resources;
diff --git a/core/java/android/util/PathParser.java b/core/java/android/util/PathParser.java
index 5342d5d..1e5ec0b 100644
--- a/core/java/android/util/PathParser.java
+++ b/core/java/android/util/PathParser.java
@@ -14,7 +14,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Path;
 
 import dalvik.annotation.optimization.FastNative;
diff --git a/core/java/android/util/Pools.java b/core/java/android/util/Pools.java
index e242fe5..7ae32441 100644
--- a/core/java/android/util/Pools.java
+++ b/core/java/android/util/Pools.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Helper class for crating pools of objects. An example use looks like this:
diff --git a/core/java/android/util/Rational.java b/core/java/android/util/Rational.java
index 39e8b14..5930000 100644
--- a/core/java/android/util/Rational.java
+++ b/core/java/android/util/Rational.java
@@ -15,9 +15,10 @@
  */
 package android.util;
 
-import static com.android.internal.util.Preconditions.*;
+import static com.android.internal.util.Preconditions.checkNotNull;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
+
 import java.io.IOException;
 import java.io.InvalidObjectException;
 
diff --git a/core/java/android/util/RecurrenceRule.java b/core/java/android/util/RecurrenceRule.java
index 9c60228..a570e5e 100644
--- a/core/java/android/util/RecurrenceRule.java
+++ b/core/java/android/util/RecurrenceRule.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/android/util/Singleton.java b/core/java/android/util/Singleton.java
index 15c6b5b..92646b4 100644
--- a/core/java/android/util/Singleton.java
+++ b/core/java/android/util/Singleton.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Singleton helper class for lazily initialization.
diff --git a/core/java/android/util/Slog.java b/core/java/android/util/Slog.java
index a85120f..2c8bbbf 100644
--- a/core/java/android/util/Slog.java
+++ b/core/java/android/util/Slog.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 
 /**
diff --git a/core/java/android/util/SparseArray.java b/core/java/android/util/SparseArray.java
index 0a15db2..3a0d1f5 100644
--- a/core/java/android/util/SparseArray.java
+++ b/core/java/android/util/SparseArray.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.GrowingArrayUtils;
diff --git a/core/java/android/util/SparseBooleanArray.java b/core/java/android/util/SparseBooleanArray.java
index d6e0e53..846df39 100644
--- a/core/java/android/util/SparseBooleanArray.java
+++ b/core/java/android/util/SparseBooleanArray.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.GrowingArrayUtils;
diff --git a/core/java/android/util/SparseIntArray.java b/core/java/android/util/SparseIntArray.java
index 1ca1717..d4f6685 100644
--- a/core/java/android/util/SparseIntArray.java
+++ b/core/java/android/util/SparseIntArray.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.GrowingArrayUtils;
diff --git a/core/java/android/util/TimeUtils.java b/core/java/android/util/TimeUtils.java
index 74cff20..8439f5a 100644
--- a/core/java/android/util/TimeUtils.java
+++ b/core/java/android/util/TimeUtils.java
@@ -19,7 +19,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.SystemClock;
 
diff --git a/core/java/android/util/TrustedTime.java b/core/java/android/util/TrustedTime.java
index c78665d..1360f87 100644
--- a/core/java/android/util/TrustedTime.java
+++ b/core/java/android/util/TrustedTime.java
@@ -16,7 +16,7 @@
 
 package android.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Interface that provides trusted time information, possibly coming from an NTP
diff --git a/core/java/android/util/XmlPullAttributes.java b/core/java/android/util/XmlPullAttributes.java
index 32fe16f..d83b355 100644
--- a/core/java/android/util/XmlPullAttributes.java
+++ b/core/java/android/util/XmlPullAttributes.java
@@ -16,13 +16,12 @@
 
 package android.util;
 
-import org.xmlpull.v1.XmlPullParser;
-
-import android.annotation.UnsupportedAppUsage;
-import android.util.AttributeSet;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.util.XmlUtils;
 
+import org.xmlpull.v1.XmlPullParser;
+
 /**
  * Provides an implementation of AttributeSet on top of an XmlPullParser.
  */
diff --git a/core/java/android/view/AccessibilityIterators.java b/core/java/android/view/AccessibilityIterators.java
index 5f9bf39..bee04f4 100644
--- a/core/java/android/view/AccessibilityIterators.java
+++ b/core/java/android/view/AccessibilityIterators.java
@@ -16,7 +16,7 @@
 
 package android.view;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.Configuration;
 
 import java.text.BreakIterator;
diff --git a/core/java/android/view/ActionMode.java b/core/java/android/view/ActionMode.java
index 6b200e1..d9f9d03 100644
--- a/core/java/android/view/ActionMode.java
+++ b/core/java/android/view/ActionMode.java
@@ -19,10 +19,9 @@
 
 import android.annotation.StringRes;
 import android.annotation.TestApi;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Rect;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 /**
  * Represents a contextual mode of the user interface. Action modes can be used to provide
  * alternative interaction modes and replace parts of the normal UI until finished.
diff --git a/core/java/android/view/ActionProvider.java b/core/java/android/view/ActionProvider.java
index cd7e67e..e1be0fe 100644
--- a/core/java/android/view/ActionProvider.java
+++ b/core/java/android/view/ActionProvider.java
@@ -16,7 +16,7 @@
 
 package android.view;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.util.Log;
 
diff --git a/core/java/android/view/AppTransitionAnimationSpec.java b/core/java/android/view/AppTransitionAnimationSpec.java
index 4c0ed52..330061f 100644
--- a/core/java/android/view/AppTransitionAnimationSpec.java
+++ b/core/java/android/view/AppTransitionAnimationSpec.java
@@ -1,6 +1,6 @@
 package android.view;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.GraphicBuffer;
 import android.graphics.Rect;
 import android.os.Parcel;
diff --git a/core/java/android/view/BatchedInputEventReceiver.java b/core/java/android/view/BatchedInputEventReceiver.java
index 61ccac9..95b2c70 100644
--- a/core/java/android/view/BatchedInputEventReceiver.java
+++ b/core/java/android/view/BatchedInputEventReceiver.java
@@ -16,7 +16,7 @@
 
 package android.view;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Looper;
 
 /**
diff --git a/core/java/android/widget/CompoundButton.java b/core/java/android/widget/CompoundButton.java
index 2674ca4..52e983e 100644
--- a/core/java/android/widget/CompoundButton.java
+++ b/core/java/android/widget/CompoundButton.java
@@ -19,7 +19,7 @@
 import android.annotation.DrawableRes;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/CursorAdapter.java b/core/java/android/widget/CursorAdapter.java
index e250f63..600a34c 100644
--- a/core/java/android/widget/CursorAdapter.java
+++ b/core/java/android/widget/CursorAdapter.java
@@ -16,8 +16,8 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.WorkerThread;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Resources;
 import android.database.ContentObserver;
diff --git a/core/java/android/widget/DatePicker.java b/core/java/android/widget/DatePicker.java
index 0c593be..c1c1a6e 100644
--- a/core/java/android/widget/DatePicker.java
+++ b/core/java/android/widget/DatePicker.java
@@ -19,8 +19,8 @@
 import android.annotation.IntDef;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.Widget;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/DatePickerSpinnerDelegate.java b/core/java/android/widget/DatePickerSpinnerDelegate.java
index 5f15110..096e6ea 100644
--- a/core/java/android/widget/DatePickerSpinnerDelegate.java
+++ b/core/java/android/widget/DatePickerSpinnerDelegate.java
@@ -16,7 +16,7 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/DateTimeView.java b/core/java/android/widget/DateTimeView.java
index 2864ad0..20a53c0 100644
--- a/core/java/android/widget/DateTimeView.java
+++ b/core/java/android/widget/DateTimeView.java
@@ -21,8 +21,8 @@
 import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
 import static android.text.format.DateUtils.YEAR_IN_MILLIS;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityThread;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/widget/EdgeEffect.java b/core/java/android/widget/EdgeEffect.java
index fa0af78..32f3acd 100644
--- a/core/java/android/widget/EdgeEffect.java
+++ b/core/java/android/widget/EdgeEffect.java
@@ -18,7 +18,7 @@
 
 import android.annotation.ColorInt;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.BlendMode;
diff --git a/core/java/android/widget/Editor.java b/core/java/android/widget/Editor.java
index cac75cfd..b6338f7 100644
--- a/core/java/android/widget/Editor.java
+++ b/core/java/android/widget/Editor.java
@@ -21,10 +21,10 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
 import android.app.PendingIntent.CanceledException;
 import android.app.RemoteAction;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ClipData;
 import android.content.ClipData.Item;
 import android.content.Context;
diff --git a/core/java/android/widget/ExpandableListView.java b/core/java/android/widget/ExpandableListView.java
index cae91fc..bdfb550 100644
--- a/core/java/android/widget/ExpandableListView.java
+++ b/core/java/android/widget/ExpandableListView.java
@@ -18,7 +18,7 @@
 
 import static android.os.Build.VERSION_CODES.JELLY_BEAN_MR1;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
diff --git a/core/java/android/widget/FastScroller.java b/core/java/android/widget/FastScroller.java
index 2c09185..0c0b349 100644
--- a/core/java/android/widget/FastScroller.java
+++ b/core/java/android/widget/FastScroller.java
@@ -23,7 +23,7 @@
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
 import android.annotation.StyleRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/Filter.java b/core/java/android/widget/Filter.java
index 16f4ee2..06e6a5a 100644
--- a/core/java/android/widget/Filter.java
+++ b/core/java/android/widget/Filter.java
@@ -16,7 +16,7 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Looper;
diff --git a/core/java/android/widget/FrameLayout.java b/core/java/android/widget/FrameLayout.java
index 69da911..92e9a96 100644
--- a/core/java/android/widget/FrameLayout.java
+++ b/core/java/android/widget/FrameLayout.java
@@ -20,7 +20,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.StyleRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Rect;
diff --git a/core/java/android/widget/Gallery.java b/core/java/android/widget/Gallery.java
index 64192aa..8c0061d 100644
--- a/core/java/android/widget/Gallery.java
+++ b/core/java/android/widget/Gallery.java
@@ -17,8 +17,8 @@
 package android.widget;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.Widget;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Rect;
diff --git a/core/java/android/widget/GridLayout.java b/core/java/android/widget/GridLayout.java
index 8cda47d..f132197 100644
--- a/core/java/android/widget/GridLayout.java
+++ b/core/java/android/widget/GridLayout.java
@@ -31,7 +31,7 @@
 import static java.lang.Math.min;
 
 import android.annotation.IntDef;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
diff --git a/core/java/android/widget/GridView.java b/core/java/android/widget/GridView.java
index 4e39a55..4a5e95e 100644
--- a/core/java/android/widget/GridView.java
+++ b/core/java/android/widget/GridView.java
@@ -18,7 +18,7 @@
 
 import android.annotation.IntDef;
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/HeaderViewListAdapter.java b/core/java/android/widget/HeaderViewListAdapter.java
index 10d50b8..eda7580 100644
--- a/core/java/android/widget/HeaderViewListAdapter.java
+++ b/core/java/android/widget/HeaderViewListAdapter.java
@@ -16,7 +16,7 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.database.DataSetObserver;
 import android.view.View;
 import android.view.ViewGroup;
diff --git a/core/java/android/widget/HorizontalScrollView.java b/core/java/android/widget/HorizontalScrollView.java
index 5921feb..f5f64c0 100644
--- a/core/java/android/widget/HorizontalScrollView.java
+++ b/core/java/android/widget/HorizontalScrollView.java
@@ -18,7 +18,7 @@
 
 import android.annotation.ColorInt;
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/ImageView.java b/core/java/android/widget/ImageView.java
index d62b979..c2077384 100644
--- a/core/java/android/widget/ImageView.java
+++ b/core/java/android/widget/ImageView.java
@@ -20,7 +20,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.res.ColorStateList;
diff --git a/core/java/android/widget/LinearLayout.java b/core/java/android/widget/LinearLayout.java
index a83e826..a796ba5 100644
--- a/core/java/android/widget/LinearLayout.java
+++ b/core/java/android/widget/LinearLayout.java
@@ -19,7 +19,7 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
diff --git a/core/java/android/widget/ListPopupWindow.java b/core/java/android/widget/ListPopupWindow.java
index 16b903d..001eb27 100644
--- a/core/java/android/widget/ListPopupWindow.java
+++ b/core/java/android/widget/ListPopupWindow.java
@@ -20,7 +20,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.StyleRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.database.DataSetObserver;
diff --git a/core/java/android/widget/ListView.java b/core/java/android/widget/ListView.java
index 2f44d6e..7260344 100644
--- a/core/java/android/widget/ListView.java
+++ b/core/java/android/widget/ListView.java
@@ -19,7 +19,7 @@
 import android.annotation.IdRes;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/MediaController.java b/core/java/android/widget/MediaController.java
index 65925b4..9c9baf3 100644
--- a/core/java/android/widget/MediaController.java
+++ b/core/java/android/widget/MediaController.java
@@ -16,7 +16,7 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.PixelFormat;
diff --git a/core/java/android/widget/NumberPicker.java b/core/java/android/widget/NumberPicker.java
index b385534..b2fedf7 100644
--- a/core/java/android/widget/NumberPicker.java
+++ b/core/java/android/widget/NumberPicker.java
@@ -23,8 +23,8 @@
 import android.annotation.IntRange;
 import android.annotation.Px;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.Widget;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/OverScroller.java b/core/java/android/widget/OverScroller.java
index e7a96be..1c33d80 100644
--- a/core/java/android/widget/OverScroller.java
+++ b/core/java/android/widget/OverScroller.java
@@ -16,7 +16,7 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.hardware.SensorManager;
 import android.util.Log;
diff --git a/core/java/android/widget/PopupMenu.java b/core/java/android/widget/PopupMenu.java
index b0c0c12..0ce9646 100644
--- a/core/java/android/widget/PopupMenu.java
+++ b/core/java/android/widget/PopupMenu.java
@@ -18,7 +18,7 @@
 
 import android.annotation.MenuRes;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.view.Gravity;
 import android.view.Menu;
diff --git a/core/java/android/widget/PopupWindow.java b/core/java/android/widget/PopupWindow.java
index 3779779..bf696f5 100644
--- a/core/java/android/widget/PopupWindow.java
+++ b/core/java/android/widget/PopupWindow.java
@@ -18,13 +18,12 @@
 
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
-import static android.view.WindowManager.LayoutParams
-        .PRIVATE_FLAG_LAYOUT_CHILD_WINDOW_IN_PARENT_FRAME;
+import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_LAYOUT_CHILD_WINDOW_IN_PARENT_FRAME;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_WILL_NOT_REPLACE_ON_RELAUNCH;
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.PixelFormat;
diff --git a/core/java/android/widget/ProgressBar.java b/core/java/android/widget/ProgressBar.java
index 2e95743..9cbb035 100644
--- a/core/java/android/widget/ProgressBar.java
+++ b/core/java/android/widget/ProgressBar.java
@@ -21,7 +21,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.Px;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/QuickContactBadge.java b/core/java/android/widget/QuickContactBadge.java
index c1a217c..ea39f6d 100644
--- a/core/java/android/widget/QuickContactBadge.java
+++ b/core/java/android/widget/QuickContactBadge.java
@@ -16,7 +16,7 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.AsyncQueryHandler;
 import android.content.ContentResolver;
 import android.content.Context;
diff --git a/core/java/android/widget/RadioGroup.java b/core/java/android/widget/RadioGroup.java
index c62c16c..69c3cda 100644
--- a/core/java/android/widget/RadioGroup.java
+++ b/core/java/android/widget/RadioGroup.java
@@ -18,7 +18,7 @@
 
 import android.annotation.IdRes;
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.util.AttributeSet;
diff --git a/core/java/android/widget/RatingBar.java b/core/java/android/widget/RatingBar.java
index 3cf3d91..f946fe6 100644
--- a/core/java/android/widget/RatingBar.java
+++ b/core/java/android/widget/RatingBar.java
@@ -16,7 +16,7 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.drawable.shapes.RectShape;
diff --git a/core/java/android/widget/RelativeLayout.java b/core/java/android/widget/RelativeLayout.java
index b9da307..521922d 100644
--- a/core/java/android/widget/RelativeLayout.java
+++ b/core/java/android/widget/RelativeLayout.java
@@ -19,7 +19,7 @@
 import static android.os.Build.VERSION_CODES.JELLY_BEAN_MR1;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.ResourceId;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/RemoteViews.java b/core/java/android/widget/RemoteViews.java
index 86cec5e..82e03e2 100644
--- a/core/java/android/widget/RemoteViews.java
+++ b/core/java/android/widget/RemoteViews.java
@@ -22,7 +22,6 @@
 import android.annotation.LayoutRes;
 import android.annotation.NonNull;
 import android.annotation.StyleRes;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.ActivityOptions;
 import android.app.ActivityThread;
@@ -30,6 +29,7 @@
 import android.app.PendingIntent;
 import android.app.RemoteInput;
 import android.appwidget.AppWidgetHostView;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.ContextWrapper;
 import android.content.Intent;
diff --git a/core/java/android/widget/RemoteViewsAdapter.java b/core/java/android/widget/RemoteViewsAdapter.java
index efc5eb3..e58f08a 100644
--- a/core/java/android/widget/RemoteViewsAdapter.java
+++ b/core/java/android/widget/RemoteViewsAdapter.java
@@ -19,11 +19,11 @@
 import static android.widget.RemoteViews.EXTRA_REMOTEADAPTER_APPWIDGET_ID;
 import static android.widget.RemoteViews.EXTRA_REMOTEADAPTER_ON_LIGHT_BACKGROUND;
 
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.WorkerThread;
 import android.app.IServiceConnection;
 import android.appwidget.AppWidgetHostView;
 import android.appwidget.AppWidgetManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/widget/ScrollBarDrawable.java b/core/java/android/widget/ScrollBarDrawable.java
index a5d3e45..80e17b5 100644
--- a/core/java/android/widget/ScrollBarDrawable.java
+++ b/core/java/android/widget/ScrollBarDrawable.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.graphics.Canvas;
 import android.graphics.ColorFilter;
 import android.graphics.PixelFormat;
diff --git a/core/java/android/widget/ScrollView.java b/core/java/android/widget/ScrollView.java
index 51b0950..6c2e7a9 100644
--- a/core/java/android/widget/ScrollView.java
+++ b/core/java/android/widget/ScrollView.java
@@ -18,7 +18,7 @@
 
 import android.annotation.ColorInt;
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/Scroller.java b/core/java/android/widget/Scroller.java
index 229eaf0..6ed5b7e 100644
--- a/core/java/android/widget/Scroller.java
+++ b/core/java/android/widget/Scroller.java
@@ -16,7 +16,7 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.hardware.SensorManager;
 import android.os.Build;
diff --git a/core/java/android/widget/SearchView.java b/core/java/android/widget/SearchView.java
index 89d9e97..15959c2 100644
--- a/core/java/android/widget/SearchView.java
+++ b/core/java/android/widget/SearchView.java
@@ -19,10 +19,10 @@
 import static android.widget.SuggestionsAdapter.getColumnString;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
 import android.app.SearchManager;
 import android.app.SearchableInfo;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ActivityNotFoundException;
 import android.content.ComponentName;
 import android.content.Context;
diff --git a/core/java/android/widget/SeekBar.java b/core/java/android/widget/SeekBar.java
index e8cf1e8..5676881 100644
--- a/core/java/android/widget/SeekBar.java
+++ b/core/java/android/widget/SeekBar.java
@@ -16,7 +16,7 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.util.AttributeSet;
 import android.view.accessibility.AccessibilityNodeInfo;
diff --git a/core/java/android/widget/SimpleAdapter.java b/core/java/android/widget/SimpleAdapter.java
index 15e1ffa..404b817 100644
--- a/core/java/android/widget/SimpleAdapter.java
+++ b/core/java/android/widget/SimpleAdapter.java
@@ -18,7 +18,7 @@
 
 import android.annotation.IdRes;
 import android.annotation.LayoutRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Resources;
 import android.net.Uri;
diff --git a/core/java/android/widget/SimpleCursorAdapter.java b/core/java/android/widget/SimpleCursorAdapter.java
index 77fe5d1..6277d5b 100644
--- a/core/java/android/widget/SimpleCursorAdapter.java
+++ b/core/java/android/widget/SimpleCursorAdapter.java
@@ -16,7 +16,7 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.database.Cursor;
 import android.net.Uri;
diff --git a/core/java/android/widget/SlidingDrawer.java b/core/java/android/widget/SlidingDrawer.java
index 2ab2b24..9a4cfa1 100644
--- a/core/java/android/widget/SlidingDrawer.java
+++ b/core/java/android/widget/SlidingDrawer.java
@@ -17,7 +17,7 @@
 package android.widget;
 
 import android.R;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Bitmap;
diff --git a/core/java/android/widget/Spinner.java b/core/java/android/widget/Spinner.java
index 92fcea3..46fc09f 100644
--- a/core/java/android/widget/Spinner.java
+++ b/core/java/android/widget/Spinner.java
@@ -19,9 +19,9 @@
 import android.annotation.DrawableRes;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.Widget;
 import android.app.AlertDialog;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
diff --git a/core/java/android/widget/Switch.java b/core/java/android/widget/Switch.java
index d57b3bc..f1f3939 100644
--- a/core/java/android/widget/Switch.java
+++ b/core/java/android/widget/Switch.java
@@ -21,7 +21,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.StyleRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.content.res.Resources;
diff --git a/core/java/android/widget/TabHost.java b/core/java/android/widget/TabHost.java
index 481704c..fd8dbf5 100644
--- a/core/java/android/widget/TabHost.java
+++ b/core/java/android/widget/TabHost.java
@@ -18,8 +18,8 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.LocalActivityManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.TypedArray;
diff --git a/core/java/android/widget/TabWidget.java b/core/java/android/widget/TabWidget.java
index 4c67b08..945cef3 100644
--- a/core/java/android/widget/TabWidget.java
+++ b/core/java/android/widget/TabWidget.java
@@ -18,7 +18,7 @@
 
 import android.annotation.DrawableRes;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
diff --git a/core/java/android/widget/TextClock.java b/core/java/android/widget/TextClock.java
index b7dd88b..88a6762 100644
--- a/core/java/android/widget/TextClock.java
+++ b/core/java/android/widget/TextClock.java
@@ -21,8 +21,8 @@
 
 import android.annotation.NonNull;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.ContentResolver;
 import android.content.Context;
diff --git a/core/java/android/widget/TextView.java b/core/java/android/widget/TextView.java
index 0918c5f..6f697cd 100644
--- a/core/java/android/widget/TextView.java
+++ b/core/java/android/widget/TextView.java
@@ -36,11 +36,11 @@
 import android.annotation.Size;
 import android.annotation.StringRes;
 import android.annotation.StyleRes;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.XmlRes;
 import android.app.Activity;
 import android.app.PendingIntent;
 import android.app.assist.AssistStructure;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ClipData;
 import android.content.ClipDescription;
 import android.content.ClipboardManager;
diff --git a/core/java/android/widget/TimePicker.java b/core/java/android/widget/TimePicker.java
index 8a5d531..51b1847 100644
--- a/core/java/android/widget/TimePicker.java
+++ b/core/java/android/widget/TimePicker.java
@@ -20,8 +20,8 @@
 import android.annotation.IntRange;
 import android.annotation.NonNull;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.Widget;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.icu.util.Calendar;
diff --git a/core/java/android/widget/Toast.java b/core/java/android/widget/Toast.java
index d037337..e6dcd9e 100644
--- a/core/java/android/widget/Toast.java
+++ b/core/java/android/widget/Toast.java
@@ -20,9 +20,9 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.StringRes;
-import android.annotation.UnsupportedAppUsage;
 import android.app.INotificationManager;
 import android.app.ITransientNotification;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
diff --git a/core/java/android/widget/Toolbar.java b/core/java/android/widget/Toolbar.java
index a21fb41..ea3f06b 100644
--- a/core/java/android/widget/Toolbar.java
+++ b/core/java/android/widget/Toolbar.java
@@ -24,8 +24,8 @@
 import android.annotation.StringRes;
 import android.annotation.StyleRes;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActionBar;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.drawable.Drawable;
diff --git a/core/java/android/widget/VideoView.java b/core/java/android/widget/VideoView.java
index 40b0f13..36dafd5 100644
--- a/core/java/android/widget/VideoView.java
+++ b/core/java/android/widget/VideoView.java
@@ -17,8 +17,8 @@
 package android.widget;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
 import android.app.AlertDialog;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.res.Resources;
diff --git a/core/java/android/widget/ViewAnimator.java b/core/java/android/widget/ViewAnimator.java
index 80ea363..909404b 100644
--- a/core/java/android/widget/ViewAnimator.java
+++ b/core/java/android/widget/ViewAnimator.java
@@ -18,7 +18,7 @@
 
 
 import android.annotation.AnimRes;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.util.AttributeSet;
diff --git a/core/java/android/widget/ViewFlipper.java b/core/java/android/widget/ViewFlipper.java
index b962298..2df9a78 100644
--- a/core/java/android/widget/ViewFlipper.java
+++ b/core/java/android/widget/ViewFlipper.java
@@ -17,7 +17,7 @@
 package android.widget;
 
 import android.annotation.IntRange;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/android/widget/ZoomControls.java b/core/java/android/widget/ZoomControls.java
index 7a5b7e8..f435533 100644
--- a/core/java/android/widget/ZoomControls.java
+++ b/core/java/android/widget/ZoomControls.java
@@ -16,8 +16,8 @@
 
 package android.widget;
 
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.Widget;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
diff --git a/core/java/com/android/ims/internal/uce/common/CapInfo.java b/core/java/com/android/ims/internal/uce/common/CapInfo.java
index a9847ba..c45a3a4 100644
--- a/core/java/com/android/ims/internal/uce/common/CapInfo.java
+++ b/core/java/com/android/ims/internal/uce/common/CapInfo.java
@@ -16,10 +16,9 @@
 
 package com.android.ims.internal.uce.common;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.util.Log;
 
 /** Class for capability discovery information.
  *  @hide */
diff --git a/core/java/com/android/ims/internal/uce/common/StatusCode.java b/core/java/com/android/ims/internal/uce/common/StatusCode.java
index 7250eee..7f69493 100644
--- a/core/java/com/android/ims/internal/uce/common/StatusCode.java
+++ b/core/java/com/android/ims/internal/uce/common/StatusCode.java
@@ -16,10 +16,9 @@
 
 package com.android.ims.internal.uce.common;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.util.Log;
 
 
 /** Class for UCE status codes.
diff --git a/core/java/com/android/ims/internal/uce/common/UceLong.java b/core/java/com/android/ims/internal/uce/common/UceLong.java
index 7207899..bf51447 100644
--- a/core/java/com/android/ims/internal/uce/common/UceLong.java
+++ b/core/java/com/android/ims/internal/uce/common/UceLong.java
@@ -16,10 +16,9 @@
 
 package com.android.ims.internal.uce.common;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.util.Log;
 
 
 /** Simple object wrapper for a long type.
diff --git a/core/java/com/android/ims/internal/uce/options/OptionsCapInfo.java b/core/java/com/android/ims/internal/uce/options/OptionsCapInfo.java
index bcb9f2d..1da5a24 100644
--- a/core/java/com/android/ims/internal/uce/options/OptionsCapInfo.java
+++ b/core/java/com/android/ims/internal/uce/options/OptionsCapInfo.java
@@ -15,11 +15,11 @@
  */
 package com.android.ims.internal.uce.options;
 
-import android.annotation.UnsupportedAppUsage;
-import com.android.ims.internal.uce.common.CapInfo;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.util.Log;
+
+import com.android.ims.internal.uce.common.CapInfo;
 
 /** @hide  */
 public class OptionsCapInfo implements Parcelable {
diff --git a/core/java/com/android/ims/internal/uce/options/OptionsCmdId.java b/core/java/com/android/ims/internal/uce/options/OptionsCmdId.java
index 14c64ac..401ca2f 100644
--- a/core/java/com/android/ims/internal/uce/options/OptionsCmdId.java
+++ b/core/java/com/android/ims/internal/uce/options/OptionsCmdId.java
@@ -17,7 +17,7 @@
 package com.android.ims.internal.uce.options;
 
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/com/android/ims/internal/uce/options/OptionsCmdStatus.java b/core/java/com/android/ims/internal/uce/options/OptionsCmdStatus.java
index 4af3e6e..70a7a84 100644
--- a/core/java/com/android/ims/internal/uce/options/OptionsCmdStatus.java
+++ b/core/java/com/android/ims/internal/uce/options/OptionsCmdStatus.java
@@ -16,13 +16,13 @@
 
 package com.android.ims.internal.uce.options;
 
-import com.android.ims.internal.uce.common.StatusCode;
-import com.android.ims.internal.uce.common.CapInfo;
-
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+import com.android.ims.internal.uce.common.CapInfo;
+import com.android.ims.internal.uce.common.StatusCode;
+
 /** @hide  */
 public class OptionsCmdStatus implements Parcelable {
 
diff --git a/core/java/com/android/ims/internal/uce/options/OptionsSipResponse.java b/core/java/com/android/ims/internal/uce/options/OptionsSipResponse.java
index c5f333d..5afddf0 100644
--- a/core/java/com/android/ims/internal/uce/options/OptionsSipResponse.java
+++ b/core/java/com/android/ims/internal/uce/options/OptionsSipResponse.java
@@ -16,7 +16,7 @@
 
 package com.android.ims.internal.uce.options;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/com/android/ims/internal/uce/presence/PresCapInfo.java b/core/java/com/android/ims/internal/uce/presence/PresCapInfo.java
index 745df5b..1a3a028 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresCapInfo.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresCapInfo.java
@@ -16,12 +16,12 @@
 
 package com.android.ims.internal.uce.presence;
 
-import com.android.ims.internal.uce.common.CapInfo;
-
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+import com.android.ims.internal.uce.common.CapInfo;
+
 
 /** @hide */
 public class PresCapInfo implements Parcelable {
diff --git a/core/java/com/android/ims/internal/uce/presence/PresCmdId.java b/core/java/com/android/ims/internal/uce/presence/PresCmdId.java
index 41020ec..fba0c77 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresCmdId.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresCmdId.java
@@ -16,7 +16,7 @@
 
 package com.android.ims.internal.uce.presence;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/com/android/ims/internal/uce/presence/PresCmdStatus.java b/core/java/com/android/ims/internal/uce/presence/PresCmdStatus.java
index ff8069c..fbc64b8 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresCmdStatus.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresCmdStatus.java
@@ -16,12 +16,12 @@
 
 package com.android.ims.internal.uce.presence;
 
-import com.android.ims.internal.uce.common.StatusCode;
-
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+import com.android.ims.internal.uce.common.StatusCode;
+
 
 /** @hide  */
 public class PresCmdStatus implements Parcelable{
diff --git a/core/java/com/android/ims/internal/uce/presence/PresPublishTriggerType.java b/core/java/com/android/ims/internal/uce/presence/PresPublishTriggerType.java
index 87193e3..a50a22f 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresPublishTriggerType.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresPublishTriggerType.java
@@ -16,7 +16,7 @@
 
 package com.android.ims.internal.uce.presence;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/com/android/ims/internal/uce/presence/PresResInfo.java b/core/java/com/android/ims/internal/uce/presence/PresResInfo.java
index 237c999..af9b056 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresResInfo.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresResInfo.java
@@ -16,7 +16,7 @@
 
 package com.android.ims.internal.uce.presence;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/com/android/ims/internal/uce/presence/PresResInstanceInfo.java b/core/java/com/android/ims/internal/uce/presence/PresResInstanceInfo.java
index 29699ea..9f37251 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresResInstanceInfo.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresResInstanceInfo.java
@@ -16,9 +16,10 @@
 
 package com.android.ims.internal.uce.presence;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
+
 import java.util.Arrays;
 
 /** @hide  */
diff --git a/core/java/com/android/ims/internal/uce/presence/PresRlmiInfo.java b/core/java/com/android/ims/internal/uce/presence/PresRlmiInfo.java
index ab46e4b..65b9fdb 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresRlmiInfo.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresRlmiInfo.java
@@ -16,7 +16,7 @@
 
 package com.android.ims.internal.uce.presence;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/com/android/ims/internal/uce/presence/PresServiceInfo.java b/core/java/com/android/ims/internal/uce/presence/PresServiceInfo.java
index 83ba722..5eafa0f 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresServiceInfo.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresServiceInfo.java
@@ -16,7 +16,7 @@
 
 package com.android.ims.internal.uce.presence;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/com/android/ims/internal/uce/presence/PresSipResponse.java b/core/java/com/android/ims/internal/uce/presence/PresSipResponse.java
index 5e42592..45b02f3 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresSipResponse.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresSipResponse.java
@@ -16,7 +16,7 @@
 
 package com.android.ims.internal.uce.presence;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/com/android/ims/internal/uce/presence/PresSubscriptionState.java b/core/java/com/android/ims/internal/uce/presence/PresSubscriptionState.java
index bee928c..ab1e17c 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresSubscriptionState.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresSubscriptionState.java
@@ -16,7 +16,7 @@
 
 package com.android.ims.internal.uce.presence;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/com/android/ims/internal/uce/presence/PresTupleInfo.java b/core/java/com/android/ims/internal/uce/presence/PresTupleInfo.java
index 7a47786..3608eb6a 100644
--- a/core/java/com/android/ims/internal/uce/presence/PresTupleInfo.java
+++ b/core/java/com/android/ims/internal/uce/presence/PresTupleInfo.java
@@ -16,7 +16,7 @@
 
 package com.android.ims.internal.uce.presence;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/core/java/com/android/internal/app/AlertActivity.java b/core/java/com/android/internal/app/AlertActivity.java
index 7307de5..cfbb273 100644
--- a/core/java/com/android/internal/app/AlertActivity.java
+++ b/core/java/com/android/internal/app/AlertActivity.java
@@ -16,9 +16,9 @@
 
 package com.android.internal.app;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.Dialog;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.DialogInterface;
 import android.os.Bundle;
 import android.view.KeyEvent;
diff --git a/core/java/com/android/internal/app/AlertController.java b/core/java/com/android/internal/app/AlertController.java
index 3462e08..a08bf99 100644
--- a/core/java/com/android/internal/app/AlertController.java
+++ b/core/java/com/android/internal/app/AlertController.java
@@ -18,14 +18,11 @@
 
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 
-import com.android.internal.R;
-
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.AlertDialog;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.DialogInterface;
-import android.content.res.Configuration;
 import android.content.res.TypedArray;
 import android.database.Cursor;
 import android.graphics.drawable.Drawable;
@@ -33,7 +30,6 @@
 import android.os.Message;
 import android.text.Layout;
 import android.text.TextUtils;
-import android.text.method.LinkMovementMethod;
 import android.text.method.MovementMethod;
 import android.util.AttributeSet;
 import android.util.TypedValue;
@@ -46,7 +42,6 @@
 import android.view.ViewParent;
 import android.view.ViewStub;
 import android.view.Window;
-import android.view.WindowInsets;
 import android.view.WindowManager;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
@@ -63,6 +58,8 @@
 import android.widget.SimpleCursorAdapter;
 import android.widget.TextView;
 
+import com.android.internal.R;
+
 import java.lang.ref.WeakReference;
 
 public class AlertController {
diff --git a/core/java/com/android/internal/app/AssistUtils.java b/core/java/com/android/internal/app/AssistUtils.java
index f848309..22a2564 100644
--- a/core/java/com/android/internal/app/AssistUtils.java
+++ b/core/java/com/android/internal/app/AssistUtils.java
@@ -17,7 +17,7 @@
 package com.android.internal.app;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
diff --git a/core/java/com/android/internal/app/ChooserActivity.java b/core/java/com/android/internal/app/ChooserActivity.java
index 102ba5c..c0c9dd3 100644
--- a/core/java/com/android/internal/app/ChooserActivity.java
+++ b/core/java/com/android/internal/app/ChooserActivity.java
@@ -26,7 +26,6 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.ActivityManager;
 import android.app.prediction.AppPredictionContext;
@@ -34,6 +33,7 @@
 import android.app.prediction.AppPredictor;
 import android.app.prediction.AppTarget;
 import android.app.prediction.AppTargetEvent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ClipData;
 import android.content.ClipboardManager;
 import android.content.ComponentName;
diff --git a/core/java/com/android/internal/app/IntentForwarderActivity.java b/core/java/com/android/internal/app/IntentForwarderActivity.java
index a5f055f..9488e4f 100644
--- a/core/java/com/android/internal/app/IntentForwarderActivity.java
+++ b/core/java/com/android/internal/app/IntentForwarderActivity.java
@@ -20,12 +20,12 @@
 
 import android.annotation.Nullable;
 import android.annotation.StringRes;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.ActivityTaskManager;
 import android.app.ActivityThread;
 import android.app.AppGlobals;
 import android.app.admin.DevicePolicyManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.IPackageManager;
diff --git a/core/java/com/android/internal/app/LocaleHelper.java b/core/java/com/android/internal/app/LocaleHelper.java
index e3d07aa..d418770e 100644
--- a/core/java/com/android/internal/app/LocaleHelper.java
+++ b/core/java/com/android/internal/app/LocaleHelper.java
@@ -17,7 +17,7 @@
 package com.android.internal.app;
 
 import android.annotation.IntRange;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.icu.text.ListFormatter;
 import android.icu.util.ULocale;
 import android.os.LocaleList;
diff --git a/core/java/com/android/internal/app/LocalePicker.java b/core/java/com/android/internal/app/LocalePicker.java
index 7517424..3343593f 100644
--- a/core/java/com/android/internal/app/LocalePicker.java
+++ b/core/java/com/android/internal/app/LocalePicker.java
@@ -16,13 +16,11 @@
 
 package com.android.internal.app;
 
-import com.android.internal.R;
-
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.app.IActivityManager;
 import android.app.ListFragment;
 import android.app.backup.BackupManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
@@ -38,11 +36,13 @@
 import android.widget.ListView;
 import android.widget.TextView;
 
+import com.android.internal.R;
+
 import java.text.Collator;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Locale;
-import java.util.ArrayList;
 
 public class LocalePicker extends ListFragment {
     private static final String TAG = "LocalePicker";
diff --git a/core/java/com/android/internal/app/LocaleStore.java b/core/java/com/android/internal/app/LocaleStore.java
index 49f77e1..1c5ca59 100644
--- a/core/java/com/android/internal/app/LocaleStore.java
+++ b/core/java/com/android/internal/app/LocaleStore.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.app;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.LocaleList;
 import android.provider.Settings;
diff --git a/core/java/com/android/internal/app/NetInitiatedActivity.java b/core/java/com/android/internal/app/NetInitiatedActivity.java
index 9a802a9..89aa770 100644
--- a/core/java/com/android/internal/app/NetInitiatedActivity.java
+++ b/core/java/com/android/internal/app/NetInitiatedActivity.java
@@ -16,19 +16,19 @@
 
 package com.android.internal.app;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.AlertDialog;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.location.LocationManager;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
-import android.widget.Toast;
 import android.util.Log;
-import android.location.LocationManager;
+import android.widget.Toast;
 
 import com.android.internal.R;
 import com.android.internal.location.GpsNetInitiatedHandler;
diff --git a/core/java/com/android/internal/app/ResolverActivity.java b/core/java/com/android/internal/app/ResolverActivity.java
index 7d19eb6..871e4f8 100644
--- a/core/java/com/android/internal/app/ResolverActivity.java
+++ b/core/java/com/android/internal/app/ResolverActivity.java
@@ -21,7 +21,6 @@
 import android.annotation.Nullable;
 import android.annotation.StringRes;
 import android.annotation.UiThread;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.ActivityManager;
 import android.app.ActivityTaskManager;
@@ -29,6 +28,7 @@
 import android.app.VoiceInteractor.PickOptionRequest;
 import android.app.VoiceInteractor.PickOptionRequest.Option;
 import android.app.VoiceInteractor.Prompt;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/com/android/internal/app/WindowDecorActionBar.java b/core/java/com/android/internal/app/WindowDecorActionBar.java
index e71ee66..0cd1202 100644
--- a/core/java/com/android/internal/app/WindowDecorActionBar.java
+++ b/core/java/com/android/internal/app/WindowDecorActionBar.java
@@ -16,28 +16,17 @@
 
 package com.android.internal.app;
 
-import com.android.internal.R;
-import com.android.internal.view.ActionBarPolicy;
-import com.android.internal.view.menu.MenuBuilder;
-import com.android.internal.view.menu.MenuPopupHelper;
-import com.android.internal.view.menu.SubMenuBuilder;
-import com.android.internal.widget.ActionBarContainer;
-import com.android.internal.widget.ActionBarContextView;
-import com.android.internal.widget.ActionBarOverlayLayout;
-import com.android.internal.widget.DecorToolbar;
-import com.android.internal.widget.ScrollingTabContainerView;
-
 import android.animation.Animator;
 import android.animation.Animator.AnimatorListener;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.animation.ValueAnimator;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActionBar;
 import android.app.Activity;
 import android.app.Dialog;
 import android.app.FragmentTransaction;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
@@ -58,6 +47,17 @@
 import android.widget.SpinnerAdapter;
 import android.widget.Toolbar;
 
+import com.android.internal.R;
+import com.android.internal.view.ActionBarPolicy;
+import com.android.internal.view.menu.MenuBuilder;
+import com.android.internal.view.menu.MenuPopupHelper;
+import com.android.internal.view.menu.SubMenuBuilder;
+import com.android.internal.widget.ActionBarContainer;
+import com.android.internal.widget.ActionBarContextView;
+import com.android.internal.widget.ActionBarOverlayLayout;
+import com.android.internal.widget.DecorToolbar;
+import com.android.internal.widget.ScrollingTabContainerView;
+
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 
diff --git a/core/java/com/android/internal/content/PackageMonitor.java b/core/java/com/android/internal/content/PackageMonitor.java
index 5d7d3af..9baa6fb 100644
--- a/core/java/com/android/internal/content/PackageMonitor.java
+++ b/core/java/com/android/internal/content/PackageMonitor.java
@@ -16,8 +16,8 @@
 
 package com.android.internal.content;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
diff --git a/core/java/com/android/internal/content/ReferrerIntent.java b/core/java/com/android/internal/content/ReferrerIntent.java
index 6d05f7e..6af03dd 100644
--- a/core/java/com/android/internal/content/ReferrerIntent.java
+++ b/core/java/com/android/internal/content/ReferrerIntent.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.content;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.os.Parcel;
 
diff --git a/core/java/com/android/internal/database/SortCursor.java b/core/java/com/android/internal/database/SortCursor.java
index 7fe809e..230a9b87 100644
--- a/core/java/com/android/internal/database/SortCursor.java
+++ b/core/java/com/android/internal/database/SortCursor.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.database;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.database.AbstractCursor;
 import android.database.Cursor;
 import android.database.DataSetObserver;
diff --git a/core/java/com/android/internal/logging/MetricsLogger.java b/core/java/com/android/internal/logging/MetricsLogger.java
index f916cf6..ed04fd8 100644
--- a/core/java/com/android/internal/logging/MetricsLogger.java
+++ b/core/java/com/android/internal/logging/MetricsLogger.java
@@ -15,7 +15,7 @@
  */
 package com.android.internal.logging;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.metrics.LogMaker;
 import android.os.Build;
diff --git a/core/java/com/android/internal/net/LegacyVpnInfo.java b/core/java/com/android/internal/net/LegacyVpnInfo.java
index 2ad9759..4eb7ded 100644
--- a/core/java/com/android/internal/net/LegacyVpnInfo.java
+++ b/core/java/com/android/internal/net/LegacyVpnInfo.java
@@ -16,8 +16,8 @@
 
 package com.android.internal.net;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.NetworkInfo;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/core/java/com/android/internal/net/VpnConfig.java b/core/java/com/android/internal/net/VpnConfig.java
index e6be549..f5a19fe 100644
--- a/core/java/com/android/internal/net/VpnConfig.java
+++ b/core/java/com/android/internal/net/VpnConfig.java
@@ -16,8 +16,8 @@
 
 package com.android.internal.net;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/com/android/internal/net/VpnProfile.java b/core/java/com/android/internal/net/VpnProfile.java
index 940cc36..4bb012a 100644
--- a/core/java/com/android/internal/net/VpnProfile.java
+++ b/core/java/com/android/internal/net/VpnProfile.java
@@ -16,10 +16,9 @@
 
 package com.android.internal.net;
 
-import android.annotation.UnsupportedAppUsage;
-import android.os.Build;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.ProxyInfo;
-import android.net.Uri;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.TextUtils;
diff --git a/core/java/com/android/internal/os/AndroidPrintStream.java b/core/java/com/android/internal/os/AndroidPrintStream.java
index fe23411..a6e41ff 100644
--- a/core/java/com/android/internal/os/AndroidPrintStream.java
+++ b/core/java/com/android/internal/os/AndroidPrintStream.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.Log;
 
 /**
diff --git a/core/java/com/android/internal/os/AtomicFile.java b/core/java/com/android/internal/os/AtomicFile.java
index a72a2f5..80b3314 100644
--- a/core/java/com/android/internal/os/AtomicFile.java
+++ b/core/java/com/android/internal/os/AtomicFile.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.FileUtils;
 import android.util.Log;
diff --git a/core/java/com/android/internal/os/BaseCommand.java b/core/java/com/android/internal/os/BaseCommand.java
index 5ba6629..db87f51 100644
--- a/core/java/com/android/internal/os/BaseCommand.java
+++ b/core/java/com/android/internal/os/BaseCommand.java
@@ -17,7 +17,7 @@
 
 package com.android.internal.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.ShellCommand;
 
 import java.io.PrintStream;
diff --git a/core/java/com/android/internal/os/BatterySipper.java b/core/java/com/android/internal/os/BatterySipper.java
index b1fc369..b3ea118 100644
--- a/core/java/com/android/internal/os/BatterySipper.java
+++ b/core/java/com/android/internal/os/BatterySipper.java
@@ -15,7 +15,7 @@
  */
 package com.android.internal.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.BatteryStats.Uid;
 
 import java.util.List;
diff --git a/core/java/com/android/internal/os/BatteryStatsHelper.java b/core/java/com/android/internal/os/BatteryStatsHelper.java
index e85508e..b131ab8 100644
--- a/core/java/com/android/internal/os/BatteryStatsHelper.java
+++ b/core/java/com/android/internal/os/BatteryStatsHelper.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
diff --git a/core/java/com/android/internal/os/BatteryStatsImpl.java b/core/java/com/android/internal/os/BatteryStatsImpl.java
index 3bd0fd2..183c0fb 100644
--- a/core/java/com/android/internal/os/BatteryStatsImpl.java
+++ b/core/java/com/android/internal/os/BatteryStatsImpl.java
@@ -18,10 +18,10 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.bluetooth.BluetoothActivityEnergyInfo;
 import android.bluetooth.UidTraffic;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.ContentResolver;
 import android.content.Context;
diff --git a/core/java/com/android/internal/os/BinderInternal.java b/core/java/com/android/internal/os/BinderInternal.java
index 4901e1f..95c36ca 100644
--- a/core/java/com/android/internal/os/BinderInternal.java
+++ b/core/java/com/android/internal/os/BinderInternal.java
@@ -17,7 +17,7 @@
 package com.android.internal.os;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Binder;
 import android.os.Handler;
 import android.os.IBinder;
diff --git a/core/java/com/android/internal/os/ClassLoaderFactory.java b/core/java/com/android/internal/os/ClassLoaderFactory.java
index d323498..a18943c 100644
--- a/core/java/com/android/internal/os/ClassLoaderFactory.java
+++ b/core/java/com/android/internal/os/ClassLoaderFactory.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Trace;
 
 import dalvik.system.DelegateLastClassLoader;
diff --git a/core/java/com/android/internal/os/FuseAppLoop.java b/core/java/com/android/internal/os/FuseAppLoop.java
index d08930b..f8f9fa9 100644
--- a/core/java/com/android/internal/os/FuseAppLoop.java
+++ b/core/java/com/android/internal/os/FuseAppLoop.java
@@ -18,17 +18,19 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
-import android.os.ProxyFileDescriptorCallback;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Handler;
 import android.os.Message;
 import android.os.ParcelFileDescriptor;
+import android.os.ProxyFileDescriptorCallback;
 import android.system.ErrnoException;
 import android.system.OsConstants;
 import android.util.Log;
 import android.util.SparseArray;
+
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.util.Preconditions;
+
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.Map;
diff --git a/core/java/com/android/internal/os/HandlerCaller.java b/core/java/com/android/internal/os/HandlerCaller.java
index c8bfa1b..a11c815 100644
--- a/core/java/com/android/internal/os/HandlerCaller.java
+++ b/core/java/com/android/internal/os/HandlerCaller.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Handler;
 import android.os.Looper;
diff --git a/core/java/com/android/internal/os/PowerProfile.java b/core/java/com/android/internal/os/PowerProfile.java
index 8338d78..d3fe582 100644
--- a/core/java/com/android/internal/os/PowerProfile.java
+++ b/core/java/com/android/internal/os/PowerProfile.java
@@ -17,7 +17,7 @@
 package com.android.internal.os;
 
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Resources;
 import android.content.res.XmlResourceParser;
diff --git a/core/java/com/android/internal/os/ProcessCpuTracker.java b/core/java/com/android/internal/os/ProcessCpuTracker.java
index dcf8d28..f7b7742 100644
--- a/core/java/com/android/internal/os/ProcessCpuTracker.java
+++ b/core/java/com/android/internal/os/ProcessCpuTracker.java
@@ -16,9 +16,14 @@
 
 package com.android.internal.os;
 
-import static android.os.Process.*;
+import static android.os.Process.PROC_COMBINE;
+import static android.os.Process.PROC_OUT_FLOAT;
+import static android.os.Process.PROC_OUT_LONG;
+import static android.os.Process.PROC_OUT_STRING;
+import static android.os.Process.PROC_PARENS;
+import static android.os.Process.PROC_SPACE_TERM;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Process;
 import android.os.StrictMode;
 import android.os.SystemClock;
diff --git a/core/java/com/android/internal/os/RuntimeInit.java b/core/java/com/android/internal/os/RuntimeInit.java
index fa823c4..179828c 100644
--- a/core/java/com/android/internal/os/RuntimeInit.java
+++ b/core/java/com/android/internal/os/RuntimeInit.java
@@ -16,10 +16,10 @@
 
 package com.android.internal.os;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.app.ActivityThread;
 import android.app.ApplicationErrorReport;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.type.DefaultMimeMapFactory;
 import android.os.Build;
 import android.os.DeadObjectException;
diff --git a/core/java/com/android/internal/os/SomeArgs.java b/core/java/com/android/internal/os/SomeArgs.java
index d78bfac..003f610 100644
--- a/core/java/com/android/internal/os/SomeArgs.java
+++ b/core/java/com/android/internal/os/SomeArgs.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Helper class for passing more arguments though a message
diff --git a/core/java/com/android/internal/os/ZygoteConnection.java b/core/java/com/android/internal/os/ZygoteConnection.java
index 4c37591..e8d6681 100644
--- a/core/java/com/android/internal/os/ZygoteConnection.java
+++ b/core/java/com/android/internal/os/ZygoteConnection.java
@@ -23,7 +23,7 @@
 import static com.android.internal.os.ZygoteConnectionConstants.CONNECTION_TIMEOUT_MILLIS;
 import static com.android.internal.os.ZygoteConnectionConstants.WRAPPED_PID_TIMEOUT_MILLIS;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.ApplicationInfo;
 import android.net.Credentials;
 import android.net.LocalSocket;
diff --git a/core/java/com/android/internal/os/ZygoteInit.java b/core/java/com/android/internal/os/ZygoteInit.java
index 7b77a92..fd02237 100644
--- a/core/java/com/android/internal/os/ZygoteInit.java
+++ b/core/java/com/android/internal/os/ZygoteInit.java
@@ -19,8 +19,8 @@
 import static android.system.OsConstants.S_IRWXG;
 import static android.system.OsConstants.S_IRWXO;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.ApplicationLoaders;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.SharedLibraryInfo;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
diff --git a/core/java/com/android/internal/os/ZygoteSecurityException.java b/core/java/com/android/internal/os/ZygoteSecurityException.java
index 7e50cb8..8111483 100644
--- a/core/java/com/android/internal/os/ZygoteSecurityException.java
+++ b/core/java/com/android/internal/os/ZygoteSecurityException.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.os;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Exception thrown when a security policy is violated.
diff --git a/core/java/com/android/internal/policy/DecorView.java b/core/java/com/android/internal/policy/DecorView.java
index 07002d7..81db441 100644
--- a/core/java/com/android/internal/policy/DecorView.java
+++ b/core/java/com/android/internal/policy/DecorView.java
@@ -46,8 +46,8 @@
 import android.animation.ObjectAnimator;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.WindowConfiguration;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
diff --git a/core/java/com/android/internal/policy/PhoneFallbackEventHandler.java b/core/java/com/android/internal/policy/PhoneFallbackEventHandler.java
index 791c2d7..f07f667 100644
--- a/core/java/com/android/internal/policy/PhoneFallbackEventHandler.java
+++ b/core/java/com/android/internal/policy/PhoneFallbackEventHandler.java
@@ -16,9 +16,9 @@
 
 package com.android.internal.policy;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.KeyguardManager;
 import android.app.SearchManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
@@ -33,7 +33,6 @@
 import android.view.HapticFeedbackConstants;
 import android.view.KeyEvent;
 import android.view.View;
-import com.android.internal.policy.PhoneWindow;
 
 /**
  * @hide
diff --git a/core/java/com/android/internal/policy/PhoneWindow.java b/core/java/com/android/internal/policy/PhoneWindow.java
index daa57e0..a785ede 100644
--- a/core/java/com/android/internal/policy/PhoneWindow.java
+++ b/core/java/com/android/internal/policy/PhoneWindow.java
@@ -34,10 +34,10 @@
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_FORCE_DRAW_BAR_BACKGROUNDS;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.app.KeyguardManager;
 import android.app.SearchManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
diff --git a/core/java/com/android/internal/preference/YesNoPreference.java b/core/java/com/android/internal/preference/YesNoPreference.java
index 94ef619..f878054 100644
--- a/core/java/com/android/internal/preference/YesNoPreference.java
+++ b/core/java/com/android/internal/preference/YesNoPreference.java
@@ -16,6 +16,7 @@
 
 package com.android.internal.preference;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.os.Parcel;
@@ -23,8 +24,6 @@
 import android.preference.DialogPreference;
 import android.util.AttributeSet;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 /**
  * The {@link YesNoPreference} is a preference to show a dialog with Yes and No
  * buttons.
diff --git a/core/java/com/android/internal/util/ArrayUtils.java b/core/java/com/android/internal/util/ArrayUtils.java
index b73ecd1..5a91880 100644
--- a/core/java/com/android/internal/util/ArrayUtils.java
+++ b/core/java/com/android/internal/util/ArrayUtils.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.ArraySet;
 
 import dalvik.system.VMRuntime;
diff --git a/core/java/com/android/internal/util/AsyncChannel.java b/core/java/com/android/internal/util/AsyncChannel.java
index b0888f2..f087718 100644
--- a/core/java/com/android/internal/util/AsyncChannel.java
+++ b/core/java/com/android/internal/util/AsyncChannel.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
diff --git a/core/java/com/android/internal/util/BitwiseInputStream.java b/core/java/com/android/internal/util/BitwiseInputStream.java
index 6ff67e9..ffae3ce 100644
--- a/core/java/com/android/internal/util/BitwiseInputStream.java
+++ b/core/java/com/android/internal/util/BitwiseInputStream.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * An object that provides bitwise incremental read access to a byte array.
diff --git a/core/java/com/android/internal/util/BitwiseOutputStream.java b/core/java/com/android/internal/util/BitwiseOutputStream.java
index cdd6f17..9f41508 100644
--- a/core/java/com/android/internal/util/BitwiseOutputStream.java
+++ b/core/java/com/android/internal/util/BitwiseOutputStream.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * An object that provides bitwise incremental write access to a byte array.
diff --git a/core/java/com/android/internal/util/CharSequences.java b/core/java/com/android/internal/util/CharSequences.java
index 6b6c43c..82ef200 100644
--- a/core/java/com/android/internal/util/CharSequences.java
+++ b/core/java/com/android/internal/util/CharSequences.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * {@link CharSequence} utility methods.
diff --git a/core/java/com/android/internal/util/FastMath.java b/core/java/com/android/internal/util/FastMath.java
index 35efe70..b7dbee5 100644
--- a/core/java/com/android/internal/util/FastMath.java
+++ b/core/java/com/android/internal/util/FastMath.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Fast and loose math routines.
diff --git a/core/java/com/android/internal/util/FastPrintWriter.java b/core/java/com/android/internal/util/FastPrintWriter.java
index 981fbaa..63124de 100644
--- a/core/java/com/android/internal/util/FastPrintWriter.java
+++ b/core/java/com/android/internal/util/FastPrintWriter.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.util;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.Log;
 import android.util.Printer;
 
diff --git a/core/java/com/android/internal/util/FastXmlSerializer.java b/core/java/com/android/internal/util/FastXmlSerializer.java
index 9f76aeb..94e07a8 100644
--- a/core/java/com/android/internal/util/FastXmlSerializer.java
+++ b/core/java/com/android/internal/util/FastXmlSerializer.java
@@ -16,9 +16,10 @@
 
 package com.android.internal.util;
 
+import android.compat.annotation.UnsupportedAppUsage;
+
 import org.xmlpull.v1.XmlSerializer;
 
-import android.annotation.UnsupportedAppUsage;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
diff --git a/packages/SettingsLib/src/com/android/settingslib/Utils.java b/packages/SettingsLib/src/com/android/settingslib/Utils.java
index ee44d0a..1141daa 100644
--- a/packages/SettingsLib/src/com/android/settingslib/Utils.java
+++ b/packages/SettingsLib/src/com/android/settingslib/Utils.java
@@ -421,7 +421,7 @@
         // is not available. Note that we ignore the IWLAN service state
         // because that state indicates the use of VoWIFI and not cell service
         final int state = serviceState.getState();
-        final int dataState = serviceState.getDataRegState();
+        final int dataState = serviceState.getDataRegistrationState();
 
         if (state == ServiceState.STATE_OUT_OF_SERVICE
                 || state == ServiceState.STATE_EMERGENCY_ONLY) {
diff --git a/packages/SettingsLib/tests/robotests/src/com/android/settingslib/UtilsTest.java b/packages/SettingsLib/tests/robotests/src/com/android/settingslib/UtilsTest.java
index 51806e0..4948987 100644
--- a/packages/SettingsLib/tests/robotests/src/com/android/settingslib/UtilsTest.java
+++ b/packages/SettingsLib/tests/robotests/src/com/android/settingslib/UtilsTest.java
@@ -227,7 +227,7 @@
     @Test
     public void isInService_voiceOutOfServiceDataInService_returnTrue() {
         when(mServiceState.getState()).thenReturn(ServiceState.STATE_OUT_OF_SERVICE);
-        when(mServiceState.getDataRegState()).thenReturn(ServiceState.STATE_IN_SERVICE);
+        when(mServiceState.getDataRegistrationState()).thenReturn(ServiceState.STATE_IN_SERVICE);
         when(mServiceState.getNetworkRegistrationInfo(NetworkRegistrationInfo.DOMAIN_PS,
                 AccessNetworkConstants.TRANSPORT_TYPE_WLAN)).thenReturn(mNetworkRegistrationInfo);
         when(mNetworkRegistrationInfo.getRegistrationState()).thenReturn(
@@ -243,7 +243,7 @@
                 AccessNetworkConstants.TRANSPORT_TYPE_WLAN)).thenReturn(mNetworkRegistrationInfo);
         when(mNetworkRegistrationInfo.getRegistrationState()).thenReturn(
                 NetworkRegistrationInfo.REGISTRATION_STATE_HOME);
-        when(mServiceState.getDataRegState()).thenReturn(ServiceState.STATE_IN_SERVICE);
+        when(mServiceState.getDataRegistrationState()).thenReturn(ServiceState.STATE_IN_SERVICE);
 
         assertThat(Utils.isInService(mServiceState)).isFalse();
     }
@@ -251,7 +251,8 @@
     @Test
     public void isInService_voiceOutOfServiceDataOutOfService_returnFalse() {
         when(mServiceState.getState()).thenReturn(ServiceState.STATE_OUT_OF_SERVICE);
-        when(mServiceState.getDataRegState()).thenReturn(ServiceState.STATE_OUT_OF_SERVICE);
+        when(mServiceState.getDataRegistrationState()).thenReturn(
+                ServiceState.STATE_OUT_OF_SERVICE);
 
         assertThat(Utils.isInService(mServiceState)).isFalse();
     }
@@ -288,7 +289,7 @@
     @Test
     public void getCombinedServiceState_voiceOutOfServiceDataInService_returnInService() {
         when(mServiceState.getState()).thenReturn(ServiceState.STATE_OUT_OF_SERVICE);
-        when(mServiceState.getDataRegState()).thenReturn(ServiceState.STATE_IN_SERVICE);
+        when(mServiceState.getDataRegistrationState()).thenReturn(ServiceState.STATE_IN_SERVICE);
         when(mServiceState.getNetworkRegistrationInfo(NetworkRegistrationInfo.DOMAIN_PS,
                 AccessNetworkConstants.TRANSPORT_TYPE_WLAN)).thenReturn(mNetworkRegistrationInfo);
         when(mNetworkRegistrationInfo.getRegistrationState()).thenReturn(
@@ -301,7 +302,7 @@
     @Test
     public void getCombinedServiceState_voiceOutOfServiceDataInServiceOnIwLan_returnOutOfService() {
         when(mServiceState.getState()).thenReturn(ServiceState.STATE_OUT_OF_SERVICE);
-        when(mServiceState.getDataRegState()).thenReturn(ServiceState.STATE_IN_SERVICE);
+        when(mServiceState.getDataRegistrationState()).thenReturn(ServiceState.STATE_IN_SERVICE);
         when(mServiceState.getNetworkRegistrationInfo(NetworkRegistrationInfo.DOMAIN_PS,
                 AccessNetworkConstants.TRANSPORT_TYPE_WLAN)).thenReturn(mNetworkRegistrationInfo);
         when(mNetworkRegistrationInfo.getRegistrationState()).thenReturn(
@@ -314,7 +315,8 @@
     @Test
     public void getCombinedServiceState_voiceOutOfServiceDataOutOfService_returnOutOfService() {
         when(mServiceState.getState()).thenReturn(ServiceState.STATE_OUT_OF_SERVICE);
-        when(mServiceState.getDataRegState()).thenReturn(ServiceState.STATE_OUT_OF_SERVICE);
+        when(mServiceState.getDataRegistrationState()).thenReturn(
+                ServiceState.STATE_OUT_OF_SERVICE);
 
         assertThat(Utils.getCombinedServiceState(mServiceState)).isEqualTo(
                 ServiceState.STATE_OUT_OF_SERVICE);
diff --git a/packages/SystemUI/src/com/android/keyguard/CarrierTextController.java b/packages/SystemUI/src/com/android/keyguard/CarrierTextController.java
index 9d9cad8..8631e86 100644
--- a/packages/SystemUI/src/com/android/keyguard/CarrierTextController.java
+++ b/packages/SystemUI/src/com/android/keyguard/CarrierTextController.java
@@ -348,7 +348,7 @@
             }
             if (simState == IccCardConstants.State.READY) {
                 ServiceState ss = mKeyguardUpdateMonitor.mServiceStates.get(subId);
-                if (ss != null && ss.getDataRegState() == ServiceState.STATE_IN_SERVICE) {
+                if (ss != null && ss.getDataRegistrationState() == ServiceState.STATE_IN_SERVICE) {
                     // hack for WFC (IWLAN) not turning off immediately once
                     // Wi-Fi is disassociated or disabled
                     if (ss.getRilDataRadioTechnology() != ServiceState.RIL_RADIO_TECHNOLOGY_IWLAN
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java
index 582775e..5020744 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java
@@ -703,8 +703,8 @@
         @Override
         public void onServiceStateChanged(ServiceState state) {
             if (DEBUG) {
-                Log.d(mTag, "onServiceStateChanged voiceState=" + state.getVoiceRegState()
-                        + " dataState=" + state.getDataRegState());
+                Log.d(mTag, "onServiceStateChanged voiceState=" + state.getState()
+                        + " dataState=" + state.getDataRegistrationState());
             }
             mServiceState = state;
             if (mServiceState != null) {
diff --git a/packages/SystemUI/tests/src/com/android/keyguard/CarrierTextControllerTest.java b/packages/SystemUI/tests/src/com/android/keyguard/CarrierTextControllerTest.java
index cfa5645..4d9ea29 100644
--- a/packages/SystemUI/tests/src/com/android/keyguard/CarrierTextControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/keyguard/CarrierTextControllerTest.java
@@ -339,7 +339,7 @@
 
         mKeyguardUpdateMonitor.mServiceStates = new HashMap<>();
         ServiceState ss = mock(ServiceState.class);
-        when(ss.getDataRegState()).thenReturn(ServiceState.STATE_IN_SERVICE);
+        when(ss.getDataRegistrationState()).thenReturn(ServiceState.STATE_IN_SERVICE);
         mKeyguardUpdateMonitor.mServiceStates.put(TEST_SUBSCRIPTION_NULL.getSubscriptionId(), ss);
 
         ArgumentCaptor<CarrierTextController.CarrierTextCallbackInfo> captor =
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerBaseTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerBaseTest.java
index 354aa83..b43527c 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerBaseTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerBaseTest.java
@@ -298,12 +298,12 @@
     }
 
     public void setVoiceRegState(int voiceRegState) {
-        when(mServiceState.getVoiceRegState()).thenReturn(voiceRegState);
+        when(mServiceState.getState()).thenReturn(voiceRegState);
         updateServiceState();
     }
 
     public void setDataRegState(int dataRegState) {
-        when(mServiceState.getDataRegState()).thenReturn(dataRegState);
+        when(mServiceState.getDataRegistrationState()).thenReturn(dataRegState);
         updateServiceState();
     }
 
diff --git a/packages/Tethering/Android.bp b/packages/Tethering/Android.bp
index 8987b54..d297f3f 100644
--- a/packages/Tethering/Android.bp
+++ b/packages/Tethering/Android.bp
@@ -32,6 +32,7 @@
     ],
     libs: [
         "framework-tethering",
+        "unsupportedappusage",
     ],
 
     manifest: "AndroidManifestBase.xml",
diff --git a/services/core/java/com/android/server/net/NetworkPolicyManagerInternal.java b/services/core/java/com/android/server/net/NetworkPolicyManagerInternal.java
index 7f650ee..b24a938 100644
--- a/services/core/java/com/android/server/net/NetworkPolicyManagerInternal.java
+++ b/services/core/java/com/android/server/net/NetworkPolicyManagerInternal.java
@@ -18,8 +18,10 @@
 
 import static com.android.server.net.NetworkPolicyManagerService.isUidNetworkingBlockedInternal;
 
+import android.annotation.NonNull;
 import android.net.Network;
 import android.net.NetworkTemplate;
+import android.net.netstats.provider.AbstractNetworkStatsProvider;
 import android.telephony.SubscriptionPlan;
 
 import java.util.Set;
@@ -126,4 +128,12 @@
      */
     public abstract void setMeteredRestrictedPackagesAsync(
             Set<String> packageNames, int userId);
+
+    /**
+     *  Notifies that any of the {@link AbstractNetworkStatsProvider} has reached its quota
+     *  which was set through {@link AbstractNetworkStatsProvider#setLimit(String, long)}.
+     *
+     * @param tag the human readable identifier of the custom network stats provider.
+     */
+    public abstract void onStatsProviderLimitReached(@NonNull String tag);
 }
diff --git a/services/core/java/com/android/server/net/NetworkPolicyManagerService.java b/services/core/java/com/android/server/net/NetworkPolicyManagerService.java
index 18c6e3a..04b51a9 100644
--- a/services/core/java/com/android/server/net/NetworkPolicyManagerService.java
+++ b/services/core/java/com/android/server/net/NetworkPolicyManagerService.java
@@ -75,6 +75,7 @@
 import static android.net.NetworkTemplate.MATCH_WIFI;
 import static android.net.NetworkTemplate.buildTemplateMobileAll;
 import static android.net.TrafficStats.MB_IN_BYTES;
+import static android.net.netstats.provider.AbstractNetworkStatsProvider.QUOTA_UNLIMITED;
 import static android.os.Trace.TRACE_TAG_NETWORK;
 import static android.provider.Settings.Global.NETPOLICY_OVERRIDE_ENABLED;
 import static android.provider.Settings.Global.NETPOLICY_QUOTA_ENABLED;
@@ -388,6 +389,7 @@
     private static final int MSG_METERED_RESTRICTED_PACKAGES_CHANGED = 17;
     private static final int MSG_SET_NETWORK_TEMPLATE_ENABLED = 18;
     private static final int MSG_SUBSCRIPTION_PLANS_CHANGED = 19;
+    private static final int MSG_STATS_PROVIDER_LIMIT_REACHED = 20;
 
     private static final int UID_MSG_STATE_CHANGED = 100;
     private static final int UID_MSG_GONE = 101;
@@ -4543,6 +4545,14 @@
                     mListeners.finishBroadcast();
                     return true;
                 }
+                case MSG_STATS_PROVIDER_LIMIT_REACHED: {
+                    mNetworkStats.forceUpdate();
+                    synchronized (mNetworkPoliciesSecondLock) {
+                        updateNetworkEnabledNL();
+                        updateNotificationsNL();
+                    }
+                    return true;
+                }
                 case MSG_LIMIT_REACHED: {
                     final String iface = (String) msg.obj;
 
@@ -4598,14 +4608,18 @@
                     return true;
                 }
                 case MSG_UPDATE_INTERFACE_QUOTA: {
-                    removeInterfaceQuota((String) msg.obj);
+                    final String iface = (String) msg.obj;
                     // int params need to be stitched back into a long
-                    setInterfaceQuota((String) msg.obj,
-                            ((long) msg.arg1 << 32) | (msg.arg2 & 0xFFFFFFFFL));
+                    final long quota = ((long) msg.arg1 << 32) | (msg.arg2 & 0xFFFFFFFFL);
+                    removeInterfaceQuota(iface);
+                    setInterfaceQuota(iface, quota);
+                    mNetworkStats.setStatsProviderLimit(iface, quota);
                     return true;
                 }
                 case MSG_REMOVE_INTERFACE_QUOTA: {
-                    removeInterfaceQuota((String) msg.obj);
+                    final String iface = (String) msg.obj;
+                    removeInterfaceQuota(iface);
+                    mNetworkStats.setStatsProviderLimit(iface, QUOTA_UNLIMITED);
                     return true;
                 }
                 case MSG_RESET_FIREWALL_RULES_BY_UID: {
@@ -5256,6 +5270,12 @@
             mHandler.obtainMessage(MSG_METERED_RESTRICTED_PACKAGES_CHANGED,
                     userId, 0, packageNames).sendToTarget();
         }
+
+        @Override
+        public void onStatsProviderLimitReached(@NonNull String tag) {
+            Log.v(TAG, "onStatsProviderLimitReached: " + tag);
+            mHandler.obtainMessage(MSG_STATS_PROVIDER_LIMIT_REACHED).sendToTarget();
+        }
     }
 
     private void setMeteredRestrictedPackagesInternal(Set<String> packageNames, int userId) {
diff --git a/services/core/java/com/android/server/net/NetworkStatsManagerInternal.java b/services/core/java/com/android/server/net/NetworkStatsManagerInternal.java
index 4843ede..6d72cb5 100644
--- a/services/core/java/com/android/server/net/NetworkStatsManagerInternal.java
+++ b/services/core/java/com/android/server/net/NetworkStatsManagerInternal.java
@@ -16,6 +16,7 @@
 
 package com.android.server.net;
 
+import android.annotation.NonNull;
 import android.net.NetworkStats;
 import android.net.NetworkTemplate;
 
@@ -34,4 +35,10 @@
 
     /** Force update of statistics. */
     public abstract void forceUpdate();
+
+    /**
+     * Set the quota limit to all registered custom network stats providers.
+     * Note that invocation of any interface will be sent to all providers.
+     */
+    public abstract void setStatsProviderLimit(@NonNull String iface, long quota);
 }
diff --git a/services/core/java/com/android/server/net/NetworkStatsService.java b/services/core/java/com/android/server/net/NetworkStatsService.java
index a80fc05..fc39a25 100644
--- a/services/core/java/com/android/server/net/NetworkStatsService.java
+++ b/services/core/java/com/android/server/net/NetworkStatsService.java
@@ -18,6 +18,7 @@
 
 import static android.Manifest.permission.ACCESS_NETWORK_STATE;
 import static android.Manifest.permission.READ_NETWORK_USAGE_HISTORY;
+import static android.Manifest.permission.UPDATE_DEVICE_STATS;
 import static android.content.Intent.ACTION_SHUTDOWN;
 import static android.content.Intent.ACTION_UID_REMOVED;
 import static android.content.Intent.ACTION_USER_REMOVED;
@@ -71,6 +72,7 @@
 import static com.android.server.NetworkManagementSocketTagger.setKernelCounterSet;
 
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.app.AlarmManager;
 import android.app.PendingIntent;
 import android.app.usage.NetworkStatsManager;
@@ -97,6 +99,9 @@
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
 import android.net.TrafficStats;
+import android.net.netstats.provider.INetworkStatsProvider;
+import android.net.netstats.provider.INetworkStatsProviderCallback;
+import android.net.netstats.provider.NetworkStatsProviderCallback;
 import android.os.BestClock;
 import android.os.Binder;
 import android.os.DropBoxManager;
@@ -109,6 +114,7 @@
 import android.os.Message;
 import android.os.Messenger;
 import android.os.PowerManager;
+import android.os.RemoteCallbackList;
 import android.os.RemoteException;
 import android.os.SystemClock;
 import android.os.Trace;
@@ -176,7 +182,7 @@
      * This avoids firing the global alert too often on devices with high transfer speeds and
      * high quota.
      */
-    private static final int PERFORM_POLL_DELAY_MS = 1000;
+    private static final int DEFAULT_PERFORM_POLL_DELAY_MS = 1000;
 
     private static final String TAG_NETSTATS_ERROR = "netstats_error";
 
@@ -220,6 +226,7 @@
      */
     public interface NetworkStatsSettings {
         public long getPollInterval();
+        public long getPollDelay();
         public boolean getSampleEnabled();
         public boolean getAugmentEnabled();
 
@@ -248,6 +255,7 @@
     }
 
     private final Object mStatsLock = new Object();
+    private final Object mStatsProviderLock = new Object();
 
     /** Set of currently active ifaces. */
     @GuardedBy("mStatsLock")
@@ -272,6 +280,9 @@
     private final DropBoxNonMonotonicObserver mNonMonotonicObserver =
             new DropBoxNonMonotonicObserver();
 
+    private final RemoteCallbackList<NetworkStatsProviderCallbackImpl> mStatsProviderCbList =
+            new RemoteCallbackList<>();
+
     @GuardedBy("mStatsLock")
     private NetworkStatsRecorder mDevRecorder;
     @GuardedBy("mStatsLock")
@@ -502,9 +513,9 @@
     }
 
     /**
-     * Register for a global alert that is delivered through
-     * {@link INetworkManagementEventObserver} once a threshold amount of data
-     * has been transferred.
+     * Register for a global alert that is delivered through {@link INetworkManagementEventObserver}
+     * or {@link NetworkStatsProviderCallback#onAlertReached()} once a threshold amount of data has
+     * been transferred.
      */
     private void registerGlobalAlert() {
         try {
@@ -514,6 +525,7 @@
         } catch (RemoteException e) {
             // ignored; service lives in system_server
         }
+        invokeForAllStatsProviderCallbacks((cb) -> cb.mProvider.setAlert(mGlobalAlertBytes));
     }
 
     @Override
@@ -803,8 +815,7 @@
     @Override
     public void incrementOperationCount(int uid, int tag, int operationCount) {
         if (Binder.getCallingUid() != uid) {
-            mContext.enforceCallingOrSelfPermission(
-                    android.Manifest.permission.UPDATE_DEVICE_STATS, TAG);
+            mContext.enforceCallingOrSelfPermission(UPDATE_DEVICE_STATS, TAG);
         }
 
         if (operationCount < 0) {
@@ -1095,7 +1106,7 @@
     /**
      * Observer that watches for {@link INetworkManagementService} alerts.
      */
-    private INetworkManagementEventObserver mAlertObserver = new BaseNetworkObserver() {
+    private final INetworkManagementEventObserver mAlertObserver = new BaseNetworkObserver() {
         @Override
         public void limitReached(String limitName, String iface) {
             // only someone like NMS should be calling us
@@ -1106,7 +1117,7 @@
                 // such a call pending; UID stats are handled during normal polling interval.
                 if (!mHandler.hasMessages(MSG_PERFORM_POLL_REGISTER_ALERT)) {
                     mHandler.sendEmptyMessageDelayed(MSG_PERFORM_POLL_REGISTER_ALERT,
-                            PERFORM_POLL_DELAY_MS);
+                            mSettings.getPollDelay());
                 }
             }
         }
@@ -1252,6 +1263,14 @@
         xtSnapshot.combineAllValues(tetherSnapshot);
         devSnapshot.combineAllValues(tetherSnapshot);
 
+        // Snapshot for dev/xt stats from all custom stats providers. Counts per-interface data
+        // from stats providers that isn't already counted by dev and XT stats.
+        Trace.traceBegin(TRACE_TAG_NETWORK, "snapshotStatsProvider");
+        final NetworkStats providersnapshot = getNetworkStatsFromProviders(STATS_PER_IFACE);
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+        xtSnapshot.combineAllValues(providersnapshot);
+        devSnapshot.combineAllValues(providersnapshot);
+
         // For xt/dev, we pass a null VPN array because usage is aggregated by UID, so VPN traffic
         // can't be reattributed to responsible apps.
         Trace.traceBegin(TRACE_TAG_NETWORK, "recordDev");
@@ -1355,6 +1374,10 @@
             performSampleLocked();
         }
 
+        // request asynchronous stats update from all providers for next poll.
+        // TODO: request with a valid token.
+        invokeForAllStatsProviderCallbacks((cb) -> cb.mProvider.requestStatsUpdate(0 /* unused */));
+
         // finally, dispatch updated event to any listeners
         final Intent updatedIntent = new Intent(ACTION_NETWORK_STATS_UPDATED);
         updatedIntent.setFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
@@ -1476,6 +1499,12 @@
         public void forceUpdate() {
             NetworkStatsService.this.forceUpdate();
         }
+
+        @Override
+        public void setStatsProviderLimit(@NonNull String iface, long quota) {
+            Slog.v(TAG, "setStatsProviderLimit(" + iface + "," + quota + ")");
+            invokeForAllStatsProviderCallbacks((cb) -> cb.mProvider.setLimit(iface, quota));
+        }
     }
 
     @Override
@@ -1690,6 +1719,12 @@
             uidSnapshot.combineAllValues(vtStats);
         }
 
+        // get a stale copy of uid stats snapshot provided by providers.
+        final NetworkStats providerStats = getNetworkStatsFromProviders(STATS_PER_UID);
+        providerStats.filter(UID_ALL, ifaces, TAG_ALL);
+        mStatsFactory.apply464xlatAdjustments(uidSnapshot, providerStats, mUseBpfTrafficStats);
+        uidSnapshot.combineAllValues(providerStats);
+
         uidSnapshot.combineAllValues(mUidOperations);
 
         return uidSnapshot;
@@ -1726,6 +1761,152 @@
         }
     }
 
+    /**
+     * Registers a custom provider of {@link android.net.NetworkStats} to combine the network
+     * statistics that cannot be seen by the kernel to system. To unregister, invoke the
+     * {@code unregister()} of the returned callback.
+     *
+     * @param tag a human readable identifier of the custom network stats provider.
+     * @param provider the binder interface of
+     *                 {@link android.net.netstats.provider.AbstractNetworkStatsProvider} that
+     *                 needs to be registered to the system.
+     *
+     * @return a binder interface of
+     *         {@link android.net.netstats.provider.NetworkStatsProviderCallback}, which can be
+     *         used to report events to the system.
+     */
+    public @NonNull INetworkStatsProviderCallback registerNetworkStatsProvider(
+            @NonNull String tag, @NonNull INetworkStatsProvider provider) {
+        mContext.enforceCallingOrSelfPermission(UPDATE_DEVICE_STATS, TAG);
+        Objects.requireNonNull(provider, "provider is null");
+        Objects.requireNonNull(tag, "tag is null");
+        try {
+            NetworkStatsProviderCallbackImpl callback = new NetworkStatsProviderCallbackImpl(
+                            tag, provider, mAlertObserver, mStatsProviderCbList);
+            mStatsProviderCbList.register(callback);
+            Log.d(TAG, "registerNetworkStatsProvider from " + callback.mTag + " uid/pid="
+                    + getCallingUid() + "/" + getCallingPid());
+            return callback;
+        } catch (RemoteException e) {
+            Log.e(TAG, "registerNetworkStatsProvider failed", e);
+        }
+        return null;
+    }
+
+    // Collect stats from local cache of providers.
+    private @NonNull NetworkStats getNetworkStatsFromProviders(int how) {
+        final NetworkStats ret = new NetworkStats(0L, 0);
+        invokeForAllStatsProviderCallbacks((cb) -> ret.combineAllValues(cb.getCachedStats(how)));
+        return ret;
+    }
+
+    @FunctionalInterface
+    private interface ThrowingConsumer<S, T extends Throwable> {
+        void accept(S s) throws T;
+    }
+
+    private void invokeForAllStatsProviderCallbacks(
+            @NonNull ThrowingConsumer<NetworkStatsProviderCallbackImpl, RemoteException> task) {
+        synchronized (mStatsProviderCbList) {
+            final int length = mStatsProviderCbList.beginBroadcast();
+            try {
+                for (int i = 0; i < length; i++) {
+                    final NetworkStatsProviderCallbackImpl cb =
+                            mStatsProviderCbList.getBroadcastItem(i);
+                    try {
+                        task.accept(cb);
+                    } catch (RemoteException e) {
+                        Log.e(TAG, "Fail to broadcast to provider: " + cb.mTag, e);
+                    }
+                }
+            } finally {
+                mStatsProviderCbList.finishBroadcast();
+            }
+        }
+    }
+
+    private static class NetworkStatsProviderCallbackImpl extends INetworkStatsProviderCallback.Stub
+            implements IBinder.DeathRecipient {
+        @NonNull final String mTag;
+        @NonNull private final Object mProviderStatsLock = new Object();
+        @NonNull final INetworkStatsProvider mProvider;
+        @NonNull final INetworkManagementEventObserver mAlertObserver;
+        @NonNull final RemoteCallbackList<NetworkStatsProviderCallbackImpl> mStatsProviderCbList;
+
+        @GuardedBy("mProviderStatsLock")
+        // STATS_PER_IFACE and STATS_PER_UID
+        private final NetworkStats mIfaceStats = new NetworkStats(0L, 0);
+        @GuardedBy("mProviderStatsLock")
+        private final NetworkStats mUidStats = new NetworkStats(0L, 0);
+
+        NetworkStatsProviderCallbackImpl(
+                @NonNull String tag, @NonNull INetworkStatsProvider provider,
+                @NonNull INetworkManagementEventObserver alertObserver,
+                @NonNull RemoteCallbackList<NetworkStatsProviderCallbackImpl> cbList)
+                throws RemoteException {
+            mTag = tag;
+            mProvider = provider;
+            mProvider.asBinder().linkToDeath(this, 0);
+            mAlertObserver = alertObserver;
+            mStatsProviderCbList = cbList;
+        }
+
+        @NonNull
+        public NetworkStats getCachedStats(int how) {
+            synchronized (mProviderStatsLock) {
+                NetworkStats stats;
+                switch (how) {
+                    case STATS_PER_IFACE:
+                        stats = mIfaceStats;
+                        break;
+                    case STATS_PER_UID:
+                        stats = mUidStats;
+                        break;
+                    default:
+                        throw new IllegalArgumentException("Invalid type: " + how);
+                }
+                // Return a defensive copy instead of local reference.
+                return stats.clone();
+            }
+        }
+
+        @Override
+        public void onStatsUpdated(int token, @Nullable NetworkStats ifaceStats,
+                @Nullable NetworkStats uidStats) {
+            // TODO: 1. Use token to map ifaces to correct NetworkIdentity.
+            //       2. Store the difference and store it directly to the recorder.
+            synchronized (mProviderStatsLock) {
+                if (ifaceStats != null) mIfaceStats.combineAllValues(ifaceStats);
+                if (uidStats != null) mUidStats.combineAllValues(uidStats);
+            }
+        }
+
+        @Override
+        public void onAlertReached() throws RemoteException {
+            mAlertObserver.limitReached(LIMIT_GLOBAL_ALERT, null /* unused */);
+        }
+
+        @Override
+        public void onLimitReached() {
+            Log.d(TAG, mTag + ": onLimitReached");
+            LocalServices.getService(NetworkPolicyManagerInternal.class)
+                    .onStatsProviderLimitReached(mTag);
+        }
+
+        @Override
+        public void binderDied() {
+            Log.d(TAG, mTag + ": binderDied");
+            mStatsProviderCbList.unregister(this);
+        }
+
+        @Override
+        public void unregister() {
+            Log.d(TAG, mTag + ": unregister");
+            mStatsProviderCbList.unregister(this);
+        }
+
+    }
+
     @VisibleForTesting
     static class HandlerCallback implements Handler.Callback {
         private final NetworkStatsService mService;
@@ -1815,6 +1996,10 @@
             return getGlobalLong(NETSTATS_POLL_INTERVAL, 30 * MINUTE_IN_MILLIS);
         }
         @Override
+        public long getPollDelay() {
+            return DEFAULT_PERFORM_POLL_DELAY_MS;
+        }
+        @Override
         public long getGlobalAlertBytes(long def) {
             return getGlobalLong(NETSTATS_GLOBAL_ALERT_BYTES, def);
         }
diff --git a/services/tests/servicestests/src/com/android/server/net/NetworkPolicyManagerServiceTest.java b/services/tests/servicestests/src/com/android/server/net/NetworkPolicyManagerServiceTest.java
index 8dfd6a4..2c941c6 100644
--- a/services/tests/servicestests/src/com/android/server/net/NetworkPolicyManagerServiceTest.java
+++ b/services/tests/servicestests/src/com/android/server/net/NetworkPolicyManagerServiceTest.java
@@ -37,6 +37,7 @@
 import static android.net.NetworkStats.IFACE_ALL;
 import static android.net.NetworkStats.SET_ALL;
 import static android.net.NetworkStats.TAG_ALL;
+import static android.net.NetworkStats.TAG_NONE;
 import static android.net.NetworkTemplate.buildTemplateMobileAll;
 import static android.net.NetworkTemplate.buildTemplateWifi;
 import static android.net.TrafficStats.MB_IN_BYTES;
@@ -1683,6 +1684,57 @@
     }
 
     /**
+     * Test that when StatsProvider triggers limit reached, new limit will be calculated and
+     * re-armed.
+     */
+    @Test
+    public void testStatsProviderLimitReached() throws Exception {
+        final int CYCLE_DAY = 15;
+
+        final NetworkStats stats = new NetworkStats(0L, 1);
+        stats.addEntry(TEST_IFACE, UID_A, SET_ALL, TAG_NONE,
+                2999, 1, 2000, 1, 0);
+        when(mStatsService.getNetworkTotalBytes(any(), anyLong(), anyLong()))
+                .thenReturn(stats.getTotalBytes());
+        when(mStatsService.getNetworkUidBytes(any(), anyLong(), anyLong()))
+                .thenReturn(stats);
+
+        // Get active mobile network in place
+        expectMobileDefaults();
+        mService.updateNetworks();
+        verify(mStatsService).setStatsProviderLimit(TEST_IFACE, Long.MAX_VALUE);
+
+        // Set limit to 10KB.
+        setNetworkPolicies(new NetworkPolicy(
+                sTemplateMobileAll, CYCLE_DAY, TIMEZONE_UTC, WARNING_DISABLED, 10000L,
+                true));
+        postMsgAndWaitForCompletion();
+
+        // Verifies that remaining quota is set to providers.
+        verify(mStatsService).setStatsProviderLimit(TEST_IFACE, 10000L - 4999L);
+
+        reset(mStatsService);
+
+        // Increase the usage.
+        stats.addEntry(TEST_IFACE, UID_A, SET_ALL, TAG_NONE,
+                1000, 1, 999, 1, 0);
+        when(mStatsService.getNetworkTotalBytes(any(), anyLong(), anyLong()))
+                .thenReturn(stats.getTotalBytes());
+        when(mStatsService.getNetworkUidBytes(any(), anyLong(), anyLong()))
+                .thenReturn(stats);
+
+        // Simulates that limit reached fires earlier by provider, but actually the quota is not
+        // yet reached.
+        final NetworkPolicyManagerInternal npmi = LocalServices
+                .getService(NetworkPolicyManagerInternal.class);
+        npmi.onStatsProviderLimitReached("TEST");
+
+        // Verifies that the limit reached leads to a force update.
+        postMsgAndWaitForCompletion();
+        verify(mStatsService).forceUpdate();
+    }
+
+    /**
      * Exhaustively test isUidNetworkingBlocked to output the expected results based on external
      * conditions.
      */
diff --git a/telephony/common/com/android/internal/telephony/EncodeException.java b/telephony/common/com/android/internal/telephony/EncodeException.java
index cdc853e..bb723a0 100644
--- a/telephony/common/com/android/internal/telephony/EncodeException.java
+++ b/telephony/common/com/android/internal/telephony/EncodeException.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.telephony;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * {@hide}
diff --git a/telephony/java/android/telephony/CellIdentityWcdma.java b/telephony/java/android/telephony/CellIdentityWcdma.java
index 556bc32..fbb43c9 100644
--- a/telephony/java/android/telephony/CellIdentityWcdma.java
+++ b/telephony/java/android/telephony/CellIdentityWcdma.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.telephony.gsm.GsmCellLocation;
 import android.text.TextUtils;
diff --git a/telephony/java/android/telephony/CellInfo.java b/telephony/java/android/telephony/CellInfo.java
index ae45307..475c99b 100644
--- a/telephony/java/android/telephony/CellInfo.java
+++ b/telephony/java/android/telephony/CellInfo.java
@@ -18,7 +18,7 @@
 
 import android.annotation.IntDef;
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.hardware.radio.V1_4.CellInfo.Info;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/telephony/java/android/telephony/CellInfoCdma.java b/telephony/java/android/telephony/CellInfoCdma.java
index 30b131f..2b1387c 100644
--- a/telephony/java/android/telephony/CellInfoCdma.java
+++ b/telephony/java/android/telephony/CellInfoCdma.java
@@ -17,11 +17,10 @@
 package android.telephony;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.telephony.Rlog;
 
 /**
  * A {@link CellInfo} representing a CDMA cell that provides identity and measurement info.
diff --git a/telephony/java/android/telephony/CellInfoGsm.java b/telephony/java/android/telephony/CellInfoGsm.java
index 137f97e..4f7c7a9 100644
--- a/telephony/java/android/telephony/CellInfoGsm.java
+++ b/telephony/java/android/telephony/CellInfoGsm.java
@@ -17,10 +17,9 @@
 package android.telephony;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.telephony.Rlog;
 
 /**
  * A {@link CellInfo} representing a GSM cell that provides identity and measurement info.
diff --git a/telephony/java/android/telephony/CellInfoLte.java b/telephony/java/android/telephony/CellInfoLte.java
index da7b7ab..6d19261 100644
--- a/telephony/java/android/telephony/CellInfoLte.java
+++ b/telephony/java/android/telephony/CellInfoLte.java
@@ -17,7 +17,7 @@
 package android.telephony;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/telephony/java/android/telephony/CellLocation.java b/telephony/java/android/telephony/CellLocation.java
index 0133153..64776e3 100644
--- a/telephony/java/android/telephony/CellLocation.java
+++ b/telephony/java/android/telephony/CellLocation.java
@@ -16,13 +16,13 @@
 
 package android.telephony;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Bundle;
 import android.os.RemoteException;
 import android.os.ServiceManager;
-
-import android.annotation.UnsupportedAppUsage;
 import android.telephony.cdma.CdmaCellLocation;
 import android.telephony.gsm.GsmCellLocation;
+
 import com.android.internal.telephony.ITelephony;
 import com.android.internal.telephony.PhoneConstants;
 
diff --git a/telephony/java/android/telephony/CellSignalStrengthGsm.java b/telephony/java/android/telephony/CellSignalStrengthGsm.java
index fb16d54..a9f3487 100644
--- a/telephony/java/android/telephony/CellSignalStrengthGsm.java
+++ b/telephony/java/android/telephony/CellSignalStrengthGsm.java
@@ -17,12 +17,11 @@
 package android.telephony;
 
 import android.annotation.IntRange;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.os.PersistableBundle;
-import android.telephony.Rlog;
 
 import java.util.Objects;
 
diff --git a/telephony/java/android/telephony/CellSignalStrengthLte.java b/telephony/java/android/telephony/CellSignalStrengthLte.java
index 8df9d23..a6ba9c2 100644
--- a/telephony/java/android/telephony/CellSignalStrengthLte.java
+++ b/telephony/java/android/telephony/CellSignalStrengthLte.java
@@ -17,7 +17,7 @@
 package android.telephony;
 
 import android.annotation.IntRange;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.os.PersistableBundle;
diff --git a/telephony/java/android/telephony/CellSignalStrengthWcdma.java b/telephony/java/android/telephony/CellSignalStrengthWcdma.java
index 4dc54f0..34b1385 100644
--- a/telephony/java/android/telephony/CellSignalStrengthWcdma.java
+++ b/telephony/java/android/telephony/CellSignalStrengthWcdma.java
@@ -18,11 +18,10 @@
 
 import android.annotation.IntRange;
 import android.annotation.StringDef;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.os.PersistableBundle;
-import android.telephony.Rlog;
 import android.text.TextUtils;
 
 import java.lang.annotation.Retention;
diff --git a/telephony/java/android/telephony/DisconnectCause.java b/telephony/java/android/telephony/DisconnectCause.java
index 04ec4b6..aff1391 100644
--- a/telephony/java/android/telephony/DisconnectCause.java
+++ b/telephony/java/android/telephony/DisconnectCause.java
@@ -18,7 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Describes the cause of a disconnected call. Those disconnect causes can be converted into a more
diff --git a/telephony/java/android/telephony/JapanesePhoneNumberFormatter.java b/telephony/java/android/telephony/JapanesePhoneNumberFormatter.java
index 92a674c..1c31368 100644
--- a/telephony/java/android/telephony/JapanesePhoneNumberFormatter.java
+++ b/telephony/java/android/telephony/JapanesePhoneNumberFormatter.java
@@ -16,7 +16,7 @@
 
 package android.telephony;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.text.Editable;
 
 /*
diff --git a/telephony/java/android/telephony/NeighboringCellInfo.java b/telephony/java/android/telephony/NeighboringCellInfo.java
index 023ed30..5f46799 100644
--- a/telephony/java/android/telephony/NeighboringCellInfo.java
+++ b/telephony/java/android/telephony/NeighboringCellInfo.java
@@ -24,7 +24,7 @@
 import static android.telephony.TelephonyManager.NETWORK_TYPE_UMTS;
 import static android.telephony.TelephonyManager.NETWORK_TYPE_UNKNOWN;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/telephony/java/android/telephony/PhoneNumberFormattingTextWatcher.java b/telephony/java/android/telephony/PhoneNumberFormattingTextWatcher.java
index ac6bcaa..d4ed860 100644
--- a/telephony/java/android/telephony/PhoneNumberFormattingTextWatcher.java
+++ b/telephony/java/android/telephony/PhoneNumberFormattingTextWatcher.java
@@ -16,15 +16,14 @@
 
 package android.telephony;
 
-import com.android.i18n.phonenumbers.AsYouTypeFormatter;
-import com.android.i18n.phonenumbers.PhoneNumberUtil;
-
-import android.annotation.UnsupportedAppUsage;
-import android.telephony.PhoneNumberUtils;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.text.Editable;
 import android.text.Selection;
 import android.text.TextWatcher;
 
+import com.android.i18n.phonenumbers.AsYouTypeFormatter;
+import com.android.i18n.phonenumbers.PhoneNumberUtil;
+
 import java.util.Locale;
 
 /**
diff --git a/telephony/java/android/telephony/PhoneNumberUtils.java b/telephony/java/android/telephony/PhoneNumberUtils.java
index 67afa7d..6e86a42 100644
--- a/telephony/java/android/telephony/PhoneNumberUtils.java
+++ b/telephony/java/android/telephony/PhoneNumberUtils.java
@@ -21,7 +21,7 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
diff --git a/telephony/java/android/telephony/PreciseCallState.java b/telephony/java/android/telephony/PreciseCallState.java
index bfa6326..98eeacf 100644
--- a/telephony/java/android/telephony/PreciseCallState.java
+++ b/telephony/java/android/telephony/PreciseCallState.java
@@ -19,14 +19,12 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.telephony.Annotation.DisconnectCauses;
 import android.telephony.Annotation.PreciseCallStates;
 import android.telephony.Annotation.PreciseDisconnectCauses;
-import android.telephony.DisconnectCause;
-import android.telephony.PreciseDisconnectCause;
 
 import java.util.Objects;
 
diff --git a/telephony/java/android/telephony/PreciseDataConnectionState.java b/telephony/java/android/telephony/PreciseDataConnectionState.java
index 78ad5c5..4c090b8 100644
--- a/telephony/java/android/telephony/PreciseDataConnectionState.java
+++ b/telephony/java/android/telephony/PreciseDataConnectionState.java
@@ -20,7 +20,7 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.LinkProperties;
 import android.os.Build;
 import android.os.Parcel;
diff --git a/telephony/java/android/telephony/RadioAccessFamily.java b/telephony/java/android/telephony/RadioAccessFamily.java
index 28f6515..bc84738 100644
--- a/telephony/java/android/telephony/RadioAccessFamily.java
+++ b/telephony/java/android/telephony/RadioAccessFamily.java
@@ -16,9 +16,7 @@
 
 package android.telephony;
 
-import android.annotation.UnsupportedAppUsage;
-import android.hardware.radio.V1_0.RadioTechnology;
-import android.hardware.radio.V1_4.CellInfo.Info;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/telephony/java/android/telephony/ServiceState.java b/telephony/java/android/telephony/ServiceState.java
index 123a612..73a8072 100644
--- a/telephony/java/android/telephony/ServiceState.java
+++ b/telephony/java/android/telephony/ServiceState.java
@@ -21,7 +21,7 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.os.Build;
 import android.os.Bundle;
diff --git a/telephony/java/android/telephony/SignalStrength.java b/telephony/java/android/telephony/SignalStrength.java
index aac56c0..2e23e9f 100644
--- a/telephony/java/android/telephony/SignalStrength.java
+++ b/telephony/java/android/telephony/SignalStrength.java
@@ -17,7 +17,7 @@
 package android.telephony;
 
 import android.annotation.NonNull;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Parcel;
diff --git a/telephony/java/android/telephony/SmsManager.java b/telephony/java/android/telephony/SmsManager.java
index 1957170..5b66495 100644
--- a/telephony/java/android/telephony/SmsManager.java
+++ b/telephony/java/android/telephony/SmsManager.java
@@ -24,9 +24,9 @@
 import android.annotation.SuppressAutoDoc;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityThread;
 import android.app.PendingIntent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.database.CursorWindow;
diff --git a/telephony/java/android/telephony/SmsMessage.java b/telephony/java/android/telephony/SmsMessage.java
index 392d3eb..d8df9a9 100644
--- a/telephony/java/android/telephony/SmsMessage.java
+++ b/telephony/java/android/telephony/SmsMessage.java
@@ -20,7 +20,7 @@
 
 import android.annotation.Nullable;
 import android.annotation.StringDef;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.Resources;
 import android.os.Binder;
 import android.text.TextUtils;
diff --git a/telephony/java/android/telephony/SubscriptionInfo.java b/telephony/java/android/telephony/SubscriptionInfo.java
index bbde1f4..79bf935 100644
--- a/telephony/java/android/telephony/SubscriptionInfo.java
+++ b/telephony/java/android/telephony/SubscriptionInfo.java
@@ -18,7 +18,7 @@
 
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
diff --git a/telephony/java/android/telephony/SubscriptionManager.java b/telephony/java/android/telephony/SubscriptionManager.java
index 4de9e1e..bb1387c 100644
--- a/telephony/java/android/telephony/SubscriptionManager.java
+++ b/telephony/java/android/telephony/SubscriptionManager.java
@@ -32,9 +32,9 @@
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.BroadcastOptions;
 import android.app.PendingIntent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageInfo;
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 05fa67f..a9d97f1 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -36,13 +36,13 @@
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
 import android.annotation.WorkerThread;
 import android.app.ActivityThread;
 import android.app.PendingIntent;
 import android.compat.Compatibility;
 import android.compat.annotation.ChangeId;
 import android.compat.annotation.EnabledAfter;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
@@ -73,7 +73,6 @@
 import android.telecom.TelecomManager;
 import android.telephony.Annotation.ApnType;
 import android.telephony.Annotation.CallState;
-import android.telephony.Annotation.DataState;
 import android.telephony.Annotation.NetworkType;
 import android.telephony.Annotation.RadioPowerState;
 import android.telephony.Annotation.SimActivationState;
diff --git a/telephony/java/android/telephony/VoLteServiceState.java b/telephony/java/android/telephony/VoLteServiceState.java
index f65c7b0..414b999 100644
--- a/telephony/java/android/telephony/VoLteServiceState.java
+++ b/telephony/java/android/telephony/VoLteServiceState.java
@@ -16,12 +16,11 @@
 
 package android.telephony;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.telephony.Rlog;
 
 /**
  * Contains LTE network state related information.
diff --git a/telephony/java/android/telephony/cdma/CdmaCellLocation.java b/telephony/java/android/telephony/cdma/CdmaCellLocation.java
index 45b1e47..9bc39a0 100644
--- a/telephony/java/android/telephony/cdma/CdmaCellLocation.java
+++ b/telephony/java/android/telephony/cdma/CdmaCellLocation.java
@@ -16,7 +16,7 @@
 
 package android.telephony.cdma;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Bundle;
 import android.telephony.CellLocation;
diff --git a/telephony/java/android/telephony/euicc/DownloadableSubscription.java b/telephony/java/android/telephony/euicc/DownloadableSubscription.java
index cb27f64..23d46ba 100644
--- a/telephony/java/android/telephony/euicc/DownloadableSubscription.java
+++ b/telephony/java/android/telephony/euicc/DownloadableSubscription.java
@@ -17,17 +17,18 @@
 
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.telephony.UiccAccessRule;
+
+import com.android.internal.util.Preconditions;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-import com.android.internal.util.Preconditions;
-
 /**
  * Information about a subscription which is downloadable to an eUICC using
  * {@link EuiccManager#downloadSubscription(DownloadableSubscription, boolean, PendingIntent).
diff --git a/telephony/java/android/telephony/euicc/EuiccInfo.java b/telephony/java/android/telephony/euicc/EuiccInfo.java
index 91ebb6c..467d268 100644
--- a/telephony/java/android/telephony/euicc/EuiccInfo.java
+++ b/telephony/java/android/telephony/euicc/EuiccInfo.java
@@ -16,7 +16,7 @@
 package android.telephony.euicc;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/telephony/java/android/telephony/gsm/GsmCellLocation.java b/telephony/java/android/telephony/gsm/GsmCellLocation.java
index d6780ce..30cea0e 100644
--- a/telephony/java/android/telephony/gsm/GsmCellLocation.java
+++ b/telephony/java/android/telephony/gsm/GsmCellLocation.java
@@ -16,7 +16,7 @@
 
 package android.telephony.gsm;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Bundle;
 import android.telephony.CellLocation;
diff --git a/telephony/java/android/telephony/ims/ImsCallForwardInfo.java b/telephony/java/android/telephony/ims/ImsCallForwardInfo.java
index 9f09d7a..d53a2e6 100644
--- a/telephony/java/android/telephony/ims/ImsCallForwardInfo.java
+++ b/telephony/java/android/telephony/ims/ImsCallForwardInfo.java
@@ -20,7 +20,7 @@
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/telephony/java/android/telephony/ims/ImsCallProfile.java b/telephony/java/android/telephony/ims/ImsCallProfile.java
index 87e5391..998b39d 100644
--- a/telephony/java/android/telephony/ims/ImsCallProfile.java
+++ b/telephony/java/android/telephony/ims/ImsCallProfile.java
@@ -20,7 +20,7 @@
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Bundle;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/telephony/java/android/telephony/ims/ImsReasonInfo.java b/telephony/java/android/telephony/ims/ImsReasonInfo.java
index f4b2cef..0d6b31d 100644
--- a/telephony/java/android/telephony/ims/ImsReasonInfo.java
+++ b/telephony/java/android/telephony/ims/ImsReasonInfo.java
@@ -20,7 +20,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/telephony/java/android/telephony/ims/ImsSsInfo.java b/telephony/java/android/telephony/ims/ImsSsInfo.java
index 77bd984..9cce95f 100644
--- a/telephony/java/android/telephony/ims/ImsSsInfo.java
+++ b/telephony/java/android/telephony/ims/ImsSsInfo.java
@@ -21,7 +21,7 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/telephony/java/android/telephony/ims/ImsStreamMediaProfile.java b/telephony/java/android/telephony/ims/ImsStreamMediaProfile.java
index b7ab0a0..b70fd64 100644
--- a/telephony/java/android/telephony/ims/ImsStreamMediaProfile.java
+++ b/telephony/java/android/telephony/ims/ImsStreamMediaProfile.java
@@ -19,7 +19,7 @@
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/telephony/java/android/telephony/ims/ImsVideoCallProvider.java b/telephony/java/android/telephony/ims/ImsVideoCallProvider.java
index 270e693..569c6d5 100644
--- a/telephony/java/android/telephony/ims/ImsVideoCallProvider.java
+++ b/telephony/java/android/telephony/ims/ImsVideoCallProvider.java
@@ -18,7 +18,7 @@
 
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.Uri;
 import android.os.Handler;
 import android.os.Looper;
diff --git a/telephony/java/android/telephony/ims/compat/ImsService.java b/telephony/java/android/telephony/ims/compat/ImsService.java
index 97a8517..eafbb14 100644
--- a/telephony/java/android/telephony/ims/compat/ImsService.java
+++ b/telephony/java/android/telephony/ims/compat/ImsService.java
@@ -17,8 +17,8 @@
 package android.telephony.ims.compat;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.Service;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.os.IBinder;
 import android.os.RemoteException;
diff --git a/telephony/java/android/telephony/ims/compat/feature/ImsFeature.java b/telephony/java/android/telephony/ims/compat/feature/ImsFeature.java
index de4f174..5a9e8e2 100644
--- a/telephony/java/android/telephony/ims/compat/feature/ImsFeature.java
+++ b/telephony/java/android/telephony/ims/compat/feature/ImsFeature.java
@@ -17,7 +17,7 @@
 package android.telephony.ims.compat.feature;
 
 import android.annotation.IntDef;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.IInterface;
 import android.os.RemoteException;
diff --git a/telephony/java/android/telephony/ims/compat/feature/MMTelFeature.java b/telephony/java/android/telephony/ims/compat/feature/MMTelFeature.java
index 3fd356a..b52c371 100644
--- a/telephony/java/android/telephony/ims/compat/feature/MMTelFeature.java
+++ b/telephony/java/android/telephony/ims/compat/feature/MMTelFeature.java
@@ -16,8 +16,8 @@
 
 package android.telephony.ims.compat.feature;
 
-import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Message;
 import android.os.RemoteException;
 import android.telephony.ims.ImsCallProfile;
diff --git a/telephony/java/android/telephony/ims/compat/stub/ImsCallSessionImplBase.java b/telephony/java/android/telephony/ims/compat/stub/ImsCallSessionImplBase.java
index d77f78e..acab738 100644
--- a/telephony/java/android/telephony/ims/compat/stub/ImsCallSessionImplBase.java
+++ b/telephony/java/android/telephony/ims/compat/stub/ImsCallSessionImplBase.java
@@ -16,7 +16,7 @@
 
 package android.telephony.ims.compat.stub;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Message;
 import android.os.RemoteException;
 import android.telephony.CallQuality;
diff --git a/telephony/java/android/telephony/ims/compat/stub/ImsConfigImplBase.java b/telephony/java/android/telephony/ims/compat/stub/ImsConfigImplBase.java
index e55c3d0..aae6f92 100644
--- a/telephony/java/android/telephony/ims/compat/stub/ImsConfigImplBase.java
+++ b/telephony/java/android/telephony/ims/compat/stub/ImsConfigImplBase.java
@@ -16,7 +16,7 @@
 
 package android.telephony.ims.compat.stub;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.Intent;
 import android.os.RemoteException;
diff --git a/telephony/java/android/telephony/ims/compat/stub/ImsUtListenerImplBase.java b/telephony/java/android/telephony/ims/compat/stub/ImsUtListenerImplBase.java
index e2024742..ce291d4 100644
--- a/telephony/java/android/telephony/ims/compat/stub/ImsUtListenerImplBase.java
+++ b/telephony/java/android/telephony/ims/compat/stub/ImsUtListenerImplBase.java
@@ -16,7 +16,7 @@
 
 package android.telephony.ims.compat.stub;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Bundle;
 import android.os.RemoteException;
 import android.telephony.ims.ImsCallForwardInfo;
diff --git a/telephony/java/com/android/ims/ImsUtInterface.java b/telephony/java/com/android/ims/ImsUtInterface.java
index e80087d..50b63bd 100644
--- a/telephony/java/com/android/ims/ImsUtInterface.java
+++ b/telephony/java/com/android/ims/ImsUtInterface.java
@@ -16,13 +16,12 @@
 
 package com.android.ims;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Handler;
 import android.os.Message;
 import android.telephony.ims.ImsCallForwardInfo;
 import android.telephony.ims.ImsSsInfo;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 /**
  * Provides APIs for the supplementary service settings using IMS (Ut interface).
  * It is created from 3GPP TS 24.623 (XCAP(XML Configuration Access Protocol)
diff --git a/telephony/java/com/android/internal/telephony/DctConstants.java b/telephony/java/com/android/internal/telephony/DctConstants.java
index 9e786ce..1449a62 100644
--- a/telephony/java/com/android/internal/telephony/DctConstants.java
+++ b/telephony/java/com/android/internal/telephony/DctConstants.java
@@ -15,9 +15,9 @@
  */
 package com.android.internal.telephony;
 
-import com.android.internal.util.Protocol;
+import android.compat.annotation.UnsupportedAppUsage;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
+import com.android.internal.util.Protocol;
 
 /**
  * @hide
diff --git a/telephony/java/com/android/internal/telephony/IccCardConstants.java b/telephony/java/com/android/internal/telephony/IccCardConstants.java
index 25f03c2..94dfae8 100644
--- a/telephony/java/com/android/internal/telephony/IccCardConstants.java
+++ b/telephony/java/com/android/internal/telephony/IccCardConstants.java
@@ -15,11 +15,10 @@
  */
 package com.android.internal.telephony;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.telephony.TelephonyManager;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 /**
  * {@hide}
  */
diff --git a/telephony/java/com/android/internal/telephony/OperatorInfo.java b/telephony/java/com/android/internal/telephony/OperatorInfo.java
index 59c39b1..64d7863 100644
--- a/telephony/java/com/android/internal/telephony/OperatorInfo.java
+++ b/telephony/java/com/android/internal/telephony/OperatorInfo.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.telephony;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/telephony/java/com/android/internal/telephony/PhoneConstants.java b/telephony/java/com/android/internal/telephony/PhoneConstants.java
index 888746a..7ec2269 100644
--- a/telephony/java/com/android/internal/telephony/PhoneConstants.java
+++ b/telephony/java/com/android/internal/telephony/PhoneConstants.java
@@ -15,7 +15,7 @@
  */
 package com.android.internal.telephony;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * @hide
diff --git a/telephony/java/com/android/internal/telephony/RILConstants.java b/telephony/java/com/android/internal/telephony/RILConstants.java
index 9cbcd7f..3994f9b 100644
--- a/telephony/java/com/android/internal/telephony/RILConstants.java
+++ b/telephony/java/com/android/internal/telephony/RILConstants.java
@@ -16,10 +16,9 @@
 
 package com.android.internal.telephony;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.sysprop.TelephonyProperties;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 import java.util.Optional;
 
 /**
diff --git a/telephony/java/com/android/internal/telephony/Sms7BitEncodingTranslator.java b/telephony/java/com/android/internal/telephony/Sms7BitEncodingTranslator.java
index d672642..1d6ec2d 100644
--- a/telephony/java/com/android/internal/telephony/Sms7BitEncodingTranslator.java
+++ b/telephony/java/com/android/internal/telephony/Sms7BitEncodingTranslator.java
@@ -16,6 +16,7 @@
 
 package com.android.internal.telephony;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.Resources;
 import android.content.res.XmlResourceParser;
 import android.telephony.Rlog;
@@ -25,8 +26,6 @@
 import com.android.internal.telephony.util.TelephonyUtils;
 import com.android.internal.telephony.util.XmlUtils;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 public class Sms7BitEncodingTranslator {
     private static final String TAG = "Sms7BitEncodingTranslator";
     @UnsupportedAppUsage
diff --git a/telephony/java/com/android/internal/telephony/SmsAddress.java b/telephony/java/com/android/internal/telephony/SmsAddress.java
index 2a8de8c..f18256a 100644
--- a/telephony/java/com/android/internal/telephony/SmsAddress.java
+++ b/telephony/java/com/android/internal/telephony/SmsAddress.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.telephony;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 public abstract class SmsAddress {
     // From TS 23.040 9.1.2.5 and TS 24.008 table 10.5.118
diff --git a/telephony/java/com/android/internal/telephony/SmsHeader.java b/telephony/java/com/android/internal/telephony/SmsHeader.java
index dd77b01..ab3fdf4 100644
--- a/telephony/java/com/android/internal/telephony/SmsHeader.java
+++ b/telephony/java/com/android/internal/telephony/SmsHeader.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.telephony;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import com.android.internal.util.HexDump;
 
diff --git a/telephony/java/com/android/internal/telephony/SmsMessageBase.java b/telephony/java/com/android/internal/telephony/SmsMessageBase.java
index e396f0c..f21f888 100644
--- a/telephony/java/com/android/internal/telephony/SmsMessageBase.java
+++ b/telephony/java/com/android/internal/telephony/SmsMessageBase.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.telephony;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.telephony.SmsMessage;
 import android.text.TextUtils;
diff --git a/telephony/java/com/android/internal/telephony/SmsRawData.java b/telephony/java/com/android/internal/telephony/SmsRawData.java
index 18727f3..9776c8f 100644
--- a/telephony/java/com/android/internal/telephony/SmsRawData.java
+++ b/telephony/java/com/android/internal/telephony/SmsRawData.java
@@ -17,7 +17,7 @@
 
 package com.android.internal.telephony;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/telephony/java/com/android/internal/telephony/TelephonyProperties.java b/telephony/java/com/android/internal/telephony/TelephonyProperties.java
index 4e42c20..ff70f8b 100644
--- a/telephony/java/com/android/internal/telephony/TelephonyProperties.java
+++ b/telephony/java/com/android/internal/telephony/TelephonyProperties.java
@@ -16,7 +16,7 @@
 
 package com.android.internal.telephony;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Contains a list of string constants used to get or set telephone properties
diff --git a/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java b/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java
index 1f7715b..e75c593 100644
--- a/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java
+++ b/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java
@@ -16,6 +16,7 @@
 
 package com.android.internal.telephony.cdma;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.Resources;
 import android.sysprop.TelephonyProperties;
 import android.telephony.PhoneNumberUtils;
@@ -41,8 +42,6 @@
 import com.android.internal.util.BitwiseInputStream;
 import com.android.internal.util.HexDump;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 import java.io.BufferedOutputStream;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
diff --git a/telephony/java/com/android/internal/telephony/cdma/UserData.java b/telephony/java/com/android/internal/telephony/cdma/UserData.java
index d960f05..d7e2968 100644
--- a/telephony/java/com/android/internal/telephony/cdma/UserData.java
+++ b/telephony/java/com/android/internal/telephony/cdma/UserData.java
@@ -16,13 +16,12 @@
 
 package com.android.internal.telephony.cdma.sms;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.SparseIntArray;
 
 import com.android.internal.telephony.SmsHeader;
 import com.android.internal.util.HexDump;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 public class UserData {
 
     @UnsupportedAppUsage
diff --git a/telephony/java/com/android/internal/telephony/cdma/sms/BearerData.java b/telephony/java/com/android/internal/telephony/cdma/sms/BearerData.java
index e9378e7..2dd115a 100644
--- a/telephony/java/com/android/internal/telephony/cdma/sms/BearerData.java
+++ b/telephony/java/com/android/internal/telephony/cdma/sms/BearerData.java
@@ -16,6 +16,7 @@
 
 package com.android.internal.telephony.cdma.sms;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.Resources;
 import android.telephony.Rlog;
 import android.telephony.SmsCbCmasInfo;
@@ -31,8 +32,6 @@
 import com.android.internal.util.BitwiseInputStream;
 import com.android.internal.util.BitwiseOutputStream;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 import java.time.Instant;
 import java.time.LocalDateTime;
 import java.time.ZoneId;
diff --git a/telephony/java/com/android/internal/telephony/cdma/sms/CdmaSmsAddress.java b/telephony/java/com/android/internal/telephony/cdma/sms/CdmaSmsAddress.java
index b268ee8..039b176 100644
--- a/telephony/java/com/android/internal/telephony/cdma/sms/CdmaSmsAddress.java
+++ b/telephony/java/com/android/internal/telephony/cdma/sms/CdmaSmsAddress.java
@@ -16,14 +16,13 @@
 
 package com.android.internal.telephony.cdma.sms;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.util.SparseBooleanArray;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.telephony.SmsAddress;
 import com.android.internal.util.HexDump;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 public class CdmaSmsAddress extends SmsAddress {
 
     /**
diff --git a/telephony/java/com/android/internal/telephony/cdma/sms/SmsEnvelope.java b/telephony/java/com/android/internal/telephony/cdma/sms/SmsEnvelope.java
index be1eab1..964e2fb 100644
--- a/telephony/java/com/android/internal/telephony/cdma/sms/SmsEnvelope.java
+++ b/telephony/java/com/android/internal/telephony/cdma/sms/SmsEnvelope.java
@@ -17,10 +17,9 @@
 package com.android.internal.telephony.cdma.sms;
 
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.telephony.cdma.CdmaSmsCbProgramData;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 public final class SmsEnvelope {
     /**
      * Message Types
diff --git a/telephony/java/com/android/internal/telephony/gsm/GsmSmsAddress.java b/telephony/java/com/android/internal/telephony/gsm/GsmSmsAddress.java
index 19e0b2d..c2adbc21 100644
--- a/telephony/java/com/android/internal/telephony/gsm/GsmSmsAddress.java
+++ b/telephony/java/com/android/internal/telephony/gsm/GsmSmsAddress.java
@@ -16,13 +16,12 @@
 
 package com.android.internal.telephony.gsm;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.telephony.PhoneNumberUtils;
 
 import com.android.internal.telephony.GsmAlphabet;
 import com.android.internal.telephony.SmsAddress;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 import java.text.ParseException;
 
 public class GsmSmsAddress extends SmsAddress {
diff --git a/telephony/java/com/android/internal/telephony/gsm/SmsCbHeader.java b/telephony/java/com/android/internal/telephony/gsm/SmsCbHeader.java
index 11bc5de..f29410d 100644
--- a/telephony/java/com/android/internal/telephony/gsm/SmsCbHeader.java
+++ b/telephony/java/com/android/internal/telephony/gsm/SmsCbHeader.java
@@ -16,13 +16,12 @@
 
 package com.android.internal.telephony.gsm;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.telephony.SmsCbCmasInfo;
 import android.telephony.SmsCbEtwsInfo;
 
 import com.android.internal.telephony.SmsConstants;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 import java.util.Arrays;
 import java.util.Locale;
 
diff --git a/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java b/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java
index e7b385c..28ecfa4 100644
--- a/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java
+++ b/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java
@@ -25,6 +25,7 @@
 import static com.android.internal.telephony.SmsConstants.MAX_USER_DATA_SEPTETS;
 import static com.android.internal.telephony.SmsConstants.MessageClass;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.Resources;
 import android.telephony.PhoneNumberUtils;
 import android.telephony.Rlog;
@@ -38,8 +39,6 @@
 import com.android.internal.telephony.SmsMessageBase;
 import com.android.internal.telephony.uicc.IccUtils;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 import java.io.ByteArrayOutputStream;
 import java.io.UnsupportedEncodingException;
 import java.text.ParseException;
diff --git a/telephony/java/com/android/internal/telephony/uicc/IccUtils.java b/telephony/java/com/android/internal/telephony/uicc/IccUtils.java
index f2d4624..eed9a86 100644
--- a/telephony/java/com/android/internal/telephony/uicc/IccUtils.java
+++ b/telephony/java/com/android/internal/telephony/uicc/IccUtils.java
@@ -16,6 +16,7 @@
 
 package com.android.internal.telephony.uicc;
 
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.Resources;
 import android.content.res.Resources.NotFoundException;
 import android.graphics.Bitmap;
@@ -25,8 +26,6 @@
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.telephony.GsmAlphabet;
 
-import dalvik.annotation.compat.UnsupportedAppUsage;
-
 import java.io.UnsupportedEncodingException;
 import java.util.List;
 
diff --git a/test-base/hiddenapi/Android.bp b/test-base/hiddenapi/Android.bp
index c4e0fab..c202467 100644
--- a/test-base/hiddenapi/Android.bp
+++ b/test-base/hiddenapi/Android.bp
@@ -25,5 +25,8 @@
 
     srcs: ["src/**/*.java"],
 
-    libs: ["android.test.base"],
+    libs: [
+        "android.test.base",
+        "unsupportedappusage",
+    ],
 }
diff --git a/test-base/hiddenapi/src/android/test/AndroidTestCase.java b/test-base/hiddenapi/src/android/test/AndroidTestCase.java
index 2b9beb1..fcb8d43 100644
--- a/test-base/hiddenapi/src/android/test/AndroidTestCase.java
+++ b/test-base/hiddenapi/src/android/test/AndroidTestCase.java
@@ -16,7 +16,7 @@
 
 package android.test;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 
 import junit.framework.TestCase;
diff --git a/test-base/hiddenapi/src/android/test/InstrumentationTestCase.java b/test-base/hiddenapi/src/android/test/InstrumentationTestCase.java
index 139cd18..a48a56c 100644
--- a/test-base/hiddenapi/src/android/test/InstrumentationTestCase.java
+++ b/test-base/hiddenapi/src/android/test/InstrumentationTestCase.java
@@ -16,7 +16,7 @@
 
 package android.test;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import junit.framework.TestCase;
 
diff --git a/test-base/hiddenapi/src/junit/framework/TestCase.java b/test-base/hiddenapi/src/junit/framework/TestCase.java
index 5a54861..59fbe2b 100644
--- a/test-base/hiddenapi/src/junit/framework/TestCase.java
+++ b/test-base/hiddenapi/src/junit/framework/TestCase.java
@@ -16,7 +16,7 @@
 
 package junit.framework;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * Stub only
diff --git a/test-base/hiddenapi/src/junit/framework/TestSuite.java b/test-base/hiddenapi/src/junit/framework/TestSuite.java
index 368c661..32305c9 100644
--- a/test-base/hiddenapi/src/junit/framework/TestSuite.java
+++ b/test-base/hiddenapi/src/junit/framework/TestSuite.java
@@ -16,7 +16,7 @@
 
 package junit.framework;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 import java.lang.reflect.Method;
 
diff --git a/tests/TelephonyCommonTests/Android.bp b/tests/TelephonyCommonTests/Android.bp
index 61c3829..4f7569d 100644
--- a/tests/TelephonyCommonTests/Android.bp
+++ b/tests/TelephonyCommonTests/Android.bp
@@ -44,5 +44,6 @@
         "android.test.runner",
         "android.test.mock",
         "android.test.base",
+        "unsupportedappusage",
     ],
 }
diff --git a/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java b/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java
index 6de068e..a9e0b9a 100644
--- a/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java
+++ b/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java
@@ -80,6 +80,7 @@
 import android.net.NetworkStats;
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
+import android.net.netstats.provider.INetworkStatsProviderCallback;
 import android.os.ConditionVariable;
 import android.os.Handler;
 import android.os.HandlerThread;
@@ -102,6 +103,7 @@
 import com.android.server.net.NetworkStatsService.NetworkStatsSettings;
 import com.android.server.net.NetworkStatsService.NetworkStatsSettings.Config;
 import com.android.testutils.HandlerUtilsKt;
+import com.android.testutils.TestableNetworkStatsProvider;
 
 import libcore.io.IoUtils;
 
@@ -1001,6 +1003,88 @@
         mService.unregisterUsageRequest(unknownRequest);
     }
 
+    @Test
+    public void testStatsProviderUpdateStats() throws Exception {
+        // Pretend that network comes online.
+        expectDefaultSettings();
+        final NetworkState[] states = new NetworkState[]{buildWifiState(true /* isMetered */)};
+        expectNetworkStatsSummary(buildEmptyStats());
+        expectNetworkStatsUidDetail(buildEmptyStats());
+
+        // Register custom provider and retrieve callback.
+        final TestableNetworkStatsProvider provider = new TestableNetworkStatsProvider();
+        final INetworkStatsProviderCallback cb =
+                mService.registerNetworkStatsProvider("TEST", provider);
+        assertNotNull(cb);
+
+        mService.forceUpdateIfaces(NETWORKS_WIFI, states, getActiveIface(states), new VpnInfo[0]);
+
+        // Verifies that one requestStatsUpdate will be called during iface update.
+        provider.expectStatsUpdate(0 /* unused */);
+
+        // Create some initial traffic and report to the service.
+        incrementCurrentTime(HOUR_IN_MILLIS);
+        final NetworkStats expectedStats = new NetworkStats(0L, 1)
+                .addValues(new NetworkStats.Entry(TEST_IFACE, UID_RED, SET_DEFAULT,
+                        TAG_NONE, METERED_YES, ROAMING_NO, DEFAULT_NETWORK_YES,
+                        128L, 2L, 128L, 2L, 1L))
+                .addValues(new NetworkStats.Entry(TEST_IFACE, UID_RED, SET_DEFAULT,
+                        0xF00D, METERED_YES, ROAMING_NO, DEFAULT_NETWORK_YES,
+                        64L, 1L, 64L, 1L, 1L));
+        cb.onStatsUpdated(0 /* unused */, expectedStats, expectedStats);
+
+        // Make another empty mutable stats object. This is necessary since the new NetworkStats
+        // object will be used to compare with the old one in NetworkStatsRecoder, two of them
+        // cannot be the same object.
+        expectNetworkStatsUidDetail(buildEmptyStats());
+
+        forcePollAndWaitForIdle();
+
+        // Verifies that one requestStatsUpdate and setAlert will be called during polling.
+        provider.expectStatsUpdate(0 /* unused */);
+        provider.expectSetAlert(MB_IN_BYTES);
+
+        // Verifies that service recorded history, does not verify uid tag part.
+        assertUidTotal(sTemplateWifi, UID_RED, 128L, 2L, 128L, 2L, 1);
+
+        // Verifies that onStatsUpdated updates the stats accordingly.
+        final NetworkStats stats = mSession.getSummaryForAllUid(
+                sTemplateWifi, Long.MIN_VALUE, Long.MAX_VALUE, true);
+        assertEquals(2, stats.size());
+        assertValues(stats, IFACE_ALL, UID_RED, SET_DEFAULT, TAG_NONE, METERED_YES, ROAMING_NO,
+                DEFAULT_NETWORK_YES, 128L, 2L, 128L, 2L, 1L);
+        assertValues(stats, IFACE_ALL, UID_RED, SET_DEFAULT, 0xF00D, METERED_YES, ROAMING_NO,
+                DEFAULT_NETWORK_YES, 64L, 1L, 64L, 1L, 1L);
+
+        // Verifies that unregister the callback will remove the provider from service.
+        cb.unregister();
+        forcePollAndWaitForIdle();
+        provider.assertNoCallback();
+    }
+
+    @Test
+    public void testStatsProviderSetAlert() throws Exception {
+        // Pretend that network comes online.
+        expectDefaultSettings();
+        NetworkState[] states = new NetworkState[]{buildWifiState(true /* isMetered */)};
+        mService.forceUpdateIfaces(NETWORKS_WIFI, states, getActiveIface(states), new VpnInfo[0]);
+
+        // Register custom provider and retrieve callback.
+        final TestableNetworkStatsProvider provider = new TestableNetworkStatsProvider();
+        final INetworkStatsProviderCallback cb =
+                mService.registerNetworkStatsProvider("TEST", provider);
+        assertNotNull(cb);
+
+        // Simulates alert quota of the provider has been reached.
+        cb.onAlertReached();
+        HandlerUtilsKt.waitForIdle(mHandler, WAIT_TIMEOUT);
+
+        // Verifies that polling is triggered by alert reached.
+        provider.expectStatsUpdate(0 /* unused */);
+        // Verifies that global alert will be re-armed.
+        provider.expectSetAlert(MB_IN_BYTES);
+    }
+
     private static File getBaseDir(File statsDir) {
         File baseDir = new File(statsDir, "netstats");
         baseDir.mkdirs();
@@ -1102,6 +1186,7 @@
     private void expectSettings(long persistBytes, long bucketDuration, long deleteAge)
             throws Exception {
         when(mSettings.getPollInterval()).thenReturn(HOUR_IN_MILLIS);
+        when(mSettings.getPollDelay()).thenReturn(0L);
         when(mSettings.getSampleEnabled()).thenReturn(true);
 
         final Config config = new Config(bucketDuration, deleteAge, deleteAge);
diff --git a/wifi/java/android/net/wifi/ScanResult.java b/wifi/java/android/net/wifi/ScanResult.java
index c0c0361..2901bd8 100644
--- a/wifi/java/android/net/wifi/ScanResult.java
+++ b/wifi/java/android/net/wifi/ScanResult.java
@@ -17,7 +17,7 @@
 package android.net.wifi;
 
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/wifi/java/android/net/wifi/WifiConfiguration.java b/wifi/java/android/net/wifi/WifiConfiguration.java
index ed41642..933dded 100644
--- a/wifi/java/android/net/wifi/WifiConfiguration.java
+++ b/wifi/java/android/net/wifi/WifiConfiguration.java
@@ -19,7 +19,7 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.PackageManager;
 import android.net.IpConfiguration;
 import android.net.IpConfiguration.ProxySettings;
diff --git a/wifi/java/android/net/wifi/WifiEnterpriseConfig.java b/wifi/java/android/net/wifi/WifiEnterpriseConfig.java
index 9d4b837..a9c2eb5 100644
--- a/wifi/java/android/net/wifi/WifiEnterpriseConfig.java
+++ b/wifi/java/android/net/wifi/WifiEnterpriseConfig.java
@@ -16,7 +16,7 @@
 package android.net.wifi;
 
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.security.Credentials;
diff --git a/wifi/java/android/net/wifi/WifiInfo.java b/wifi/java/android/net/wifi/WifiInfo.java
index 0b55794..8bad71b 100644
--- a/wifi/java/android/net/wifi/WifiInfo.java
+++ b/wifi/java/android/net/wifi/WifiInfo.java
@@ -19,7 +19,7 @@
 import android.annotation.IntRange;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.NetworkInfo.DetailedState;
 import android.net.NetworkUtils;
 import android.os.Build;
diff --git a/wifi/java/android/net/wifi/WifiManager.java b/wifi/java/android/net/wifi/WifiManager.java
index 671b3c7..f85bb5f 100644
--- a/wifi/java/android/net/wifi/WifiManager.java
+++ b/wifi/java/android/net/wifi/WifiManager.java
@@ -29,8 +29,8 @@
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
-import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.content.pm.ParceledListSlice;
 import android.net.ConnectivityManager;
diff --git a/wifi/java/android/net/wifi/WifiSsid.java b/wifi/java/android/net/wifi/WifiSsid.java
index f187e10..a591f31 100644
--- a/wifi/java/android/net/wifi/WifiSsid.java
+++ b/wifi/java/android/net/wifi/WifiSsid.java
@@ -16,7 +16,7 @@
 
 package android.net.wifi;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/wifi/java/android/net/wifi/p2p/WifiP2pConfig.java b/wifi/java/android/net/wifi/p2p/WifiP2pConfig.java
index c3cfb02..b0ea720 100644
--- a/wifi/java/android/net/wifi/p2p/WifiP2pConfig.java
+++ b/wifi/java/android/net/wifi/p2p/WifiP2pConfig.java
@@ -19,7 +19,7 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.MacAddress;
 import android.net.wifi.WpsInfo;
 import android.os.Parcel;
diff --git a/wifi/java/android/net/wifi/p2p/WifiP2pDevice.java b/wifi/java/android/net/wifi/p2p/WifiP2pDevice.java
index c5318a9..69aefcc 100644
--- a/wifi/java/android/net/wifi/p2p/WifiP2pDevice.java
+++ b/wifi/java/android/net/wifi/p2p/WifiP2pDevice.java
@@ -16,7 +16,7 @@
 
 package android.net.wifi.p2p;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.Log;
diff --git a/wifi/java/android/net/wifi/p2p/WifiP2pDeviceList.java b/wifi/java/android/net/wifi/p2p/WifiP2pDeviceList.java
index acf06fb..ededf67 100644
--- a/wifi/java/android/net/wifi/p2p/WifiP2pDeviceList.java
+++ b/wifi/java/android/net/wifi/p2p/WifiP2pDeviceList.java
@@ -16,10 +16,9 @@
 
 package android.net.wifi.p2p;
 
-import android.annotation.UnsupportedAppUsage;
-import android.os.Parcelable;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
-import android.net.wifi.p2p.WifiP2pDevice;
+import android.os.Parcelable;
 import android.text.TextUtils;
 
 import java.util.ArrayList;
diff --git a/wifi/java/android/net/wifi/p2p/WifiP2pGroup.java b/wifi/java/android/net/wifi/p2p/WifiP2pGroup.java
index 4866bd4..b292da1 100644
--- a/wifi/java/android/net/wifi/p2p/WifiP2pGroup.java
+++ b/wifi/java/android/net/wifi/p2p/WifiP2pGroup.java
@@ -16,7 +16,7 @@
 
 package android.net.wifi.p2p;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
diff --git a/wifi/java/android/net/wifi/p2p/WifiP2pGroupList.java b/wifi/java/android/net/wifi/p2p/WifiP2pGroupList.java
index 62524d9..6068d3a 100644
--- a/wifi/java/android/net/wifi/p2p/WifiP2pGroupList.java
+++ b/wifi/java/android/net/wifi/p2p/WifiP2pGroupList.java
@@ -15,14 +15,14 @@
  */
 package android.net.wifi.p2p;
 
-import java.util.Collection;
-import java.util.Map;
-
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.LruCache;
 
+import java.util.Collection;
+import java.util.Map;
+
 
 /**
  * A class representing a Wi-Fi P2p group list
diff --git a/wifi/java/android/net/wifi/p2p/WifiP2pManager.java b/wifi/java/android/net/wifi/p2p/WifiP2pManager.java
index d37c4a2..eec4a00 100644
--- a/wifi/java/android/net/wifi/p2p/WifiP2pManager.java
+++ b/wifi/java/android/net/wifi/p2p/WifiP2pManager.java
@@ -23,7 +23,7 @@
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemService;
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.net.NetworkInfo;
 import android.net.wifi.WpsInfo;
diff --git a/wifi/java/android/net/wifi/p2p/WifiP2pProvDiscEvent.java b/wifi/java/android/net/wifi/p2p/WifiP2pProvDiscEvent.java
index 153e03c..d0fe92d 100644
--- a/wifi/java/android/net/wifi/p2p/WifiP2pProvDiscEvent.java
+++ b/wifi/java/android/net/wifi/p2p/WifiP2pProvDiscEvent.java
@@ -16,7 +16,7 @@
 
 package android.net.wifi.p2p;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 
 /**
  * A class representing a Wi-Fi p2p provisional discovery request/response
diff --git a/wifi/java/android/net/wifi/p2p/WifiP2pWfdInfo.java b/wifi/java/android/net/wifi/p2p/WifiP2pWfdInfo.java
index 3caa280..7a5f909 100644
--- a/wifi/java/android/net/wifi/p2p/WifiP2pWfdInfo.java
+++ b/wifi/java/android/net/wifi/p2p/WifiP2pWfdInfo.java
@@ -16,10 +16,10 @@
 
 package android.net.wifi.p2p;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
-import android.os.Parcelable;
 import android.os.Parcel;
+import android.os.Parcelable;
 
 import java.util.Locale;
 
diff --git a/wifi/java/android/net/wifi/p2p/nsd/WifiP2pDnsSdServiceInfo.java b/wifi/java/android/net/wifi/p2p/nsd/WifiP2pDnsSdServiceInfo.java
index e32c8e8..0de7ba6 100644
--- a/wifi/java/android/net/wifi/p2p/nsd/WifiP2pDnsSdServiceInfo.java
+++ b/wifi/java/android/net/wifi/p2p/nsd/WifiP2pDnsSdServiceInfo.java
@@ -16,7 +16,7 @@
 
 package android.net.wifi.p2p.nsd;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.nsd.DnsSdTxtRecord;
 import android.os.Build;
 import android.text.TextUtils;
diff --git a/wifi/java/android/net/wifi/p2p/nsd/WifiP2pServiceInfo.java b/wifi/java/android/net/wifi/p2p/nsd/WifiP2pServiceInfo.java
index db0bdb8..37b442b 100644
--- a/wifi/java/android/net/wifi/p2p/nsd/WifiP2pServiceInfo.java
+++ b/wifi/java/android/net/wifi/p2p/nsd/WifiP2pServiceInfo.java
@@ -16,7 +16,7 @@
 
 package android.net.wifi.p2p.nsd;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
diff --git a/wifi/java/android/net/wifi/p2p/nsd/WifiP2pServiceRequest.java b/wifi/java/android/net/wifi/p2p/nsd/WifiP2pServiceRequest.java
index 87528c4..68cbb88 100644
--- a/wifi/java/android/net/wifi/p2p/nsd/WifiP2pServiceRequest.java
+++ b/wifi/java/android/net/wifi/p2p/nsd/WifiP2pServiceRequest.java
@@ -16,7 +16,7 @@
 
 package android.net.wifi.p2p.nsd;
 
-import android.annotation.UnsupportedAppUsage;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.net.wifi.p2p.WifiP2pManager;
 import android.os.Build;
 import android.os.Parcel;