diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index 0265431..45f6570 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -199,6 +199,24 @@
     defaults: ["framework-minus-apex-aconfig-java-defaults"],
 }
 
+// Media
+aconfig_declarations {
+    name: "android.media.playback.flags-aconfig",
+    package: "com.android.media.playback.flags",
+    srcs: ["media/jni/playback_flags.aconfig"],
+}
+
+cc_aconfig_library {
+    name: "android.media.playback.flags-aconfig-cc",
+    aconfig_declarations: "android.media.playback.flags-aconfig",
+}
+
+java_aconfig_library {
+    name: "android.media.playback.flags-aconfig-java",
+    aconfig_declarations: "android.media.playback.flags-aconfig",
+    defaults: ["framework-minus-apex-aconfig-java-defaults"],
+}
+
 // VCN
 aconfig_declarations {
     name: "android.net.vcn.flags-aconfig",
diff --git a/Android.bp b/Android.bp
index 1d11014..1fb50b6 100644
--- a/Android.bp
+++ b/Android.bp
@@ -603,19 +603,6 @@
     ],
 }
 
-packages_to_document = [
-    "android",
-    "dalvik",
-    "java",
-    "javax",
-    "junit",
-    "org.apache.http",
-    "org.json",
-    "org.w3c.dom",
-    "org.xml.sax",
-    "org.xmlpull",
-]
-
 filegroup {
     name: "android-non-updatable-stub-sources",
     srcs: [
@@ -630,198 +617,6 @@
     visibility: ["//frameworks/base/api"],
 }
 
-// Defaults for all stubs that include the non-updatable framework. These defaults do not include
-// module symbols, so will not compile correctly on their own. Users must add module APIs to the
-// classpath (or sources) somehow.
-stubs_defaults {
-    name: "android-non-updatable-stubs-defaults",
-    srcs: [":android-non-updatable-stub-sources"],
-    sdk_version: "none",
-    system_modules: "none",
-    java_version: "1.8",
-    arg_files: [":frameworks-base-core-AndroidManifest.xml"],
-    aidl: {
-        include_dirs: [
-            "frameworks/av/aidl",
-            "frameworks/base/media/aidl",
-            "frameworks/base/telephony/java",
-            "frameworks/native/libs/permission/aidl",
-            "packages/modules/Bluetooth/framework/aidl-export",
-            "packages/modules/Connectivity/framework/aidl-export",
-            "packages/modules/Media/apex/aidl/stable",
-            "hardware/interfaces/biometrics/common/aidl",
-            "hardware/interfaces/biometrics/fingerprint/aidl",
-            "hardware/interfaces/graphics/common/aidl",
-            "hardware/interfaces/keymaster/aidl",
-            "system/hardware/interfaces/media/aidl",
-        ],
-    },
-    // These are libs from framework-internal-utils that are required (i.e. being referenced)
-    // from framework-non-updatable-sources. Add more here when there's a need.
-    // DO NOT add the entire framework-internal-utils. It might cause unnecessary circular
-    // dependencies gets bigger.
-    libs: [
-        "android.hardware.cas-V1.2-java",
-        "android.hardware.health-V1.0-java-constants",
-        "android.hardware.radio-V1.5-java",
-        "android.hardware.radio-V1.6-java",
-        "android.hardware.thermal-V1.0-java-constants",
-        "android.hardware.thermal-V2.0-java",
-        "android.hardware.tv.input-V1.0-java-constants",
-        "android.hardware.usb-V1.0-java-constants",
-        "android.hardware.usb-V1.1-java-constants",
-        "android.hardware.usb.gadget-V1.0-java",
-        "android.hardware.vibrator-V1.3-java",
-        "framework-protos",
-    ],
-    flags: [
-        "--api-lint-ignore-prefix android.icu.",
-        "--api-lint-ignore-prefix java.",
-        "--api-lint-ignore-prefix junit.",
-        "--api-lint-ignore-prefix org.",
-        "--error NoSettingsProvider",
-        "--error UnhiddenSystemApi",
-        "--error UnflaggedApi",
-        "--force-convert-to-warning-nullability-annotations +*:-android.*:+android.icu.*:-dalvik.*",
-        "--hide BroadcastBehavior",
-        "--hide CallbackInterface",
-        "--hide DeprecationMismatch",
-        "--hide HiddenSuperclass",
-        "--hide MissingPermission",
-        "--hide RequiresPermission",
-        "--hide SdkConstant",
-        "--hide Todo",
-        "--hide-package android.audio.policy.configuration.V7_0",
-        "--hide-package com.android.server",
-        "--manifest $(location :frameworks-base-core-AndroidManifest.xml)",
-    ],
-    filter_packages: packages_to_document,
-    high_mem: true, // Lots of sources => high memory use, see b/170701554
-    installable: false,
-    annotations_enabled: true,
-    previous_api: ":android.api.public.latest",
-    merge_annotations_dirs: ["metalava-manual"],
-    defaults_visibility: ["//frameworks/base/api"],
-    visibility: ["//frameworks/base/api"],
-}
-
-// Defaults with module APIs in the classpath (mostly from prebuilts).
-// Suitable for compiling android-non-updatable.
-stubs_defaults {
-    name: "module-classpath-stubs-defaults",
-    aidl: {
-        include_dirs: [
-            "packages/modules/Bluetooth/framework/aidl-export",
-            "packages/modules/Connectivity/framework/aidl-export",
-            "packages/modules/Media/apex/aidl/stable",
-        ],
-    },
-    libs: [
-        "art.module.public.api",
-        "sdk_module-lib_current_framework-tethering",
-        "sdk_module-lib_current_framework-connectivity-t",
-        "sdk_public_current_framework-bluetooth",
-        // There are a few classes from modules used by the core that
-        // need to be resolved by metalava. We use a prebuilt stub of the
-        // full sdk to ensure we can resolve them. If a new class gets added,
-        // the prebuilts/sdk/current needs to be updated.
-        "sdk_system_current_android",
-        // NOTE: The below can be removed once the prebuilt stub contains IKE.
-        "sdk_system_current_android.net.ipsec.ike",
-    ],
-}
-
-// Defaults for the java_sdk_libraries of unbundled jars from framework.
-// java_sdk_libraries using these defaults should also add themselves to the
-// non_updatable_modules list in frameworks/base/api/api.go
-java_defaults {
-    name: "framework-non-updatable-unbundled-defaults",
-    defaults: ["framework-non-updatable-lint-defaults"],
-
-    sdk_version: "core_platform",
-
-    // Api scope settings
-    public: {
-        enabled: true,
-        sdk_version: "module_current",
-        libs: ["android_module_lib_stubs_current"],
-    },
-    system: {
-        enabled: true,
-        sdk_version: "module_current",
-        libs: ["android_module_lib_stubs_current"],
-    },
-    module_lib: {
-        enabled: true,
-        sdk_version: "module_current",
-        libs: ["android_module_lib_stubs_current"],
-    },
-    test: {
-        enabled: true,
-        sdk_version: "test_frameworks_core_current",
-        libs: ["android_test_frameworks_core_stubs_current"],
-    },
-
-    stub_only_libs: [
-        "framework-protos",
-    ],
-    impl_only_libs: [
-        "framework-minus-apex-headers", // full access to framework-minus-apex including hidden API
-        "framework-annotations-lib",
-    ],
-    visibility: ["//visibility:public"],
-    stubs_library_visibility: ["//visibility:public"],
-    stubs_source_visibility: ["//visibility:private"],
-    impl_library_visibility: [
-        ":__pkg__",
-        "//frameworks/base",
-        "//frameworks/base/api", // For framework-all
-    ],
-    defaults_visibility: [
-        "//frameworks/base/location",
-    ],
-    plugins: [
-        "error_prone_android_framework",
-    ],
-    errorprone: {
-        javacflags: [
-            "-Xep:AndroidFrameworkCompatChange:ERROR",
-            "-Xep:AndroidFrameworkUid:ERROR",
-        ],
-    },
-
-    // Include manual annotations in API txt files
-    merge_annotations_dirs: ["metalava-manual"],
-
-    // Use the source of annotations that affect metalava doc generation, since
-    // the relevant generation instructions are themselves in javadoc, which is
-    // not present in class files.
-    api_srcs: [":framework-metalava-annotations"],
-
-    // Framework modules are not generally shared libraries, i.e. they are not
-    // intended, and must not be allowed, to be used in a <uses-library> manifest
-    // entry.
-    shared_library: false,
-
-    // Prevent dependencies that do not specify an sdk_version from accessing the
-    // implementation library by default and force them to use stubs instead.
-    default_to_stubs: true,
-
-    // Subdirectory for the artifacts that are copied to the dist directory
-    dist_group: "android",
-
-    droiddoc_options: [
-        "--error UnhiddenSystemApi " +
-            "--hide CallbackInterface " +
-            "--hide HiddenTypedefConstant " +
-            "--hide RequiresPermission " +
-            "--enhance-documentation " +
-            "--hide-package com.android.server ",
-    ],
-
-    annotations_enabled: true,
-}
-
 build = [
     "AconfigFlags.bp",
     "ProtoLibraries.bp",
diff --git a/BAL_OWNERS b/BAL_OWNERS
new file mode 100644
index 0000000..d56a1d4
--- /dev/null
+++ b/BAL_OWNERS
@@ -0,0 +1,5 @@
+brufino@google.com
+achim@google.com
+topjohnwu@google.com
+lus@google.com
+
diff --git a/api/Android.bp b/api/Android.bp
index 6986ac0..d2e0849 100644
--- a/api/Android.bp
+++ b/api/Android.bp
@@ -262,6 +262,157 @@
     cmd: "cat $(in) | md5sum | cut -d' ' -f1 > $(out)",
 }
 
+packages_to_document = [
+    "android",
+    "dalvik",
+    "java",
+    "javax",
+    "junit",
+    "org.apache.http",
+    "org.json",
+    "org.w3c.dom",
+    "org.xml.sax",
+    "org.xmlpull",
+]
+
+// Defaults for all stubs that include the non-updatable framework. These defaults do not include
+// module symbols, so will not compile correctly on their own. Users must add module APIs to the
+// classpath (or sources) somehow.
+stubs_defaults {
+    name: "android-non-updatable-stubs-defaults",
+    srcs: [":android-non-updatable-stub-sources"],
+    sdk_version: "none",
+    system_modules: "none",
+    java_version: "1.8",
+    arg_files: [":frameworks-base-core-AndroidManifest.xml"],
+    aidl: {
+        include_dirs: [
+            "frameworks/av/aidl",
+            "frameworks/base/media/aidl",
+            "frameworks/base/telephony/java",
+            "frameworks/native/libs/permission/aidl",
+            "packages/modules/Bluetooth/framework/aidl-export",
+            "packages/modules/Connectivity/framework/aidl-export",
+            "packages/modules/Media/apex/aidl/stable",
+            "hardware/interfaces/biometrics/common/aidl",
+            "hardware/interfaces/biometrics/fingerprint/aidl",
+            "hardware/interfaces/graphics/common/aidl",
+            "hardware/interfaces/keymaster/aidl",
+            "system/hardware/interfaces/media/aidl",
+        ],
+    },
+    // These are libs from framework-internal-utils that are required (i.e. being referenced)
+    // from framework-non-updatable-sources. Add more here when there's a need.
+    // DO NOT add the entire framework-internal-utils. It might cause unnecessary circular
+    // dependencies gets bigger.
+    libs: [
+        "android.hardware.cas-V1.2-java",
+        "android.hardware.health-V1.0-java-constants",
+        "android.hardware.radio-V1.5-java",
+        "android.hardware.radio-V1.6-java",
+        "android.hardware.thermal-V1.0-java-constants",
+        "android.hardware.thermal-V2.0-java",
+        "android.hardware.tv.input-V1.0-java-constants",
+        "android.hardware.usb-V1.0-java-constants",
+        "android.hardware.usb-V1.1-java-constants",
+        "android.hardware.usb.gadget-V1.0-java",
+        "android.hardware.vibrator-V1.3-java",
+        "framework-protos",
+    ],
+    flags: [
+        "--api-lint-ignore-prefix android.icu.",
+        "--api-lint-ignore-prefix java.",
+        "--api-lint-ignore-prefix junit.",
+        "--api-lint-ignore-prefix org.",
+        "--error NoSettingsProvider",
+        "--error UnhiddenSystemApi",
+        "--error UnflaggedApi",
+        "--force-convert-to-warning-nullability-annotations +*:-android.*:+android.icu.*:-dalvik.*",
+        "--hide BroadcastBehavior",
+        "--hide CallbackInterface",
+        "--hide DeprecationMismatch",
+        "--hide HiddenSuperclass",
+        "--hide MissingPermission",
+        "--hide RequiresPermission",
+        "--hide SdkConstant",
+        "--hide Todo",
+        "--hide-package android.audio.policy.configuration.V7_0",
+        "--hide-package com.android.server",
+        "--manifest $(location :frameworks-base-core-AndroidManifest.xml)",
+    ],
+    filter_packages: packages_to_document,
+    high_mem: true, // Lots of sources => high memory use, see b/170701554
+    installable: false,
+    annotations_enabled: true,
+    previous_api: ":android.api.public.latest",
+    merge_annotations_dirs: ["metalava-manual"],
+    defaults_visibility: ["//frameworks/base/api"],
+    visibility: ["//frameworks/base/api"],
+}
+
+// Defaults with module APIs in the classpath (mostly from prebuilts).
+// Suitable for compiling android-non-updatable.
+stubs_defaults {
+    name: "module-classpath-stubs-defaults",
+    aidl: {
+        include_dirs: [
+            "packages/modules/Bluetooth/framework/aidl-export",
+            "packages/modules/Connectivity/framework/aidl-export",
+            "packages/modules/Media/apex/aidl/stable",
+        ],
+    },
+    libs: [
+        "art.module.public.api",
+        "sdk_module-lib_current_framework-tethering",
+        "sdk_module-lib_current_framework-connectivity-t",
+        "sdk_public_current_framework-bluetooth",
+        // There are a few classes from modules used by the core that
+        // need to be resolved by metalava. We use a prebuilt stub of the
+        // full sdk to ensure we can resolve them. If a new class gets added,
+        // the prebuilts/sdk/current needs to be updated.
+        "sdk_system_current_android",
+        // NOTE: The below can be removed once the prebuilt stub contains IKE.
+        "sdk_system_current_android.net.ipsec.ike",
+    ],
+}
+
+// Defaults for the java_sdk_libraries of unbundled jars from framework.
+// java_sdk_libraries using these defaults should also add themselves to the
+// non_updatable_modules list in frameworks/base/api/api.go
+java_defaults {
+    name: "framework-non-updatable-unbundled-defaults",
+    defaults: [
+        "framework-non-updatable-lint-defaults",
+        "non-updatable-framework-module-defaults",
+    ],
+    public: {
+        libs: ["android_module_lib_stubs_current"],
+    },
+    system: {
+        libs: ["android_module_lib_stubs_current"],
+    },
+    module_lib: {
+        libs: ["android_module_lib_stubs_current"],
+    },
+    test: {
+        libs: ["android_test_frameworks_core_stubs_current"],
+    },
+    sdk_version: "core_platform",
+    stub_only_libs: ["framework-protos"],
+    impl_only_libs: ["framework-minus-apex-headers"], // the framework, including hidden API
+    impl_library_visibility: ["//frameworks/base"],
+    defaults_visibility: ["//frameworks/base/location"],
+    plugins: ["error_prone_android_framework"],
+    errorprone: {
+        javacflags: [
+            "-Xep:AndroidFrameworkCompatChange:ERROR",
+            "-Xep:AndroidFrameworkUid:ERROR",
+        ],
+    },
+    // Include manual annotations in API txt files
+    merge_annotations_dirs: ["metalava-manual"],
+}
+
 build = [
     "ApiDocs.bp",
     "StubLibraries.bp",
diff --git a/core/java/android/app/OWNERS b/core/java/android/app/OWNERS
index e1c45d9..164bdbe 100644
--- a/core/java/android/app/OWNERS
+++ b/core/java/android/app/OWNERS
@@ -36,6 +36,7 @@
 per-file GameState* = file:/GAME_MANAGER_OWNERS
 per-file IGameManager* = file:/GAME_MANAGER_OWNERS
 per-file IGameMode* = file:/GAME_MANAGER_OWNERS
+per-file BackgroundStartPrivileges.java = file:/BAL_OWNERS
 
 # ActivityThread
 per-file ActivityThread.java = file:/services/core/java/com/android/server/am/OWNERS
diff --git a/core/java/android/content/Intent.java b/core/java/android/content/Intent.java
index c3fd744..0fd0e15 100644
--- a/core/java/android/content/Intent.java
+++ b/core/java/android/content/Intent.java
@@ -1161,6 +1161,11 @@
      * numbers.  Applications can <strong>dial</strong> emergency numbers using
      * {@link #ACTION_DIAL}, however.
      *
+     * <p>Note: This Intent can only be used to dial call forwarding MMI codes if the application
+     * using this intent is set as the default or system dialer. The system will treat any other
+     * application using this Intent for the purpose of dialing call forwarding MMI codes as if the
+     * {@link #ACTION_DIAL} Intent was used instead.
+     *
      * <p>Note: An app filling the {@link android.app.role.RoleManager#ROLE_DIALER} role should use
      * {@link android.telecom.TelecomManager#placeCall(Uri, Bundle)} to place calls rather than
      * relying on this intent.
diff --git a/core/java/android/os/BatteryManager.java b/core/java/android/os/BatteryManager.java
index 6a4ec9b..25fba60 100644
--- a/core/java/android/os/BatteryManager.java
+++ b/core/java/android/os/BatteryManager.java
@@ -21,6 +21,7 @@
 import android.Manifest.permission;
 import android.annotation.FlaggedApi;
 import android.annotation.RequiresPermission;
+import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
@@ -236,6 +237,7 @@
                                             OsProtoEnums.CHARGING_POLICY_ADAPTIVE_LONGLIFE; // = 4
 
     /** @hide */
+    @SuppressLint("UnflaggedApi") // TestApi without associated feature.
     @TestApi
     public static final int BATTERY_PLUGGED_ANY =
             BATTERY_PLUGGED_AC | BATTERY_PLUGGED_USB | BATTERY_PLUGGED_WIRELESS
diff --git a/core/java/android/os/GraphicsEnvironment.java b/core/java/android/os/GraphicsEnvironment.java
index a07735e..8fcff78 100644
--- a/core/java/android/os/GraphicsEnvironment.java
+++ b/core/java/android/os/GraphicsEnvironment.java
@@ -117,8 +117,6 @@
     private static final String ANGLE_GL_DRIVER_CHOICE_NATIVE = "native";
     private static final String SYSTEM_ANGLE_STRING = "system";
 
-    private static final String PROPERTY_RO_ANGLE_SUPPORTED = "ro.gfx.angle.supported";
-
     private ClassLoader mClassLoader;
     private String mLibrarySearchPaths;
     private String mLibraryPermittedPaths;
@@ -620,8 +618,7 @@
     }
 
     /**
-     * Attempt to set up ANGLE from system, if the apk can be found, pass ANGLE details to
-     * the C++ GraphicsEnv class.
+     * Set up ANGLE from system.
      *
      * @param context - Context of the application.
      * @param bundle - Bundle of the application.
@@ -630,14 +627,8 @@
      *         false: can not set up to use system ANGLE because it doesn't exist.
      */
     private boolean setupAngleFromSystem(Context context, Bundle bundle, String packageName) {
-        final boolean systemAngleSupported = SystemProperties
-                                             .getBoolean(PROPERTY_RO_ANGLE_SUPPORTED, false);
-        if (!systemAngleSupported) {
-            return false;
-        }
-
-        // If we make it to here, system ANGLE will be used.  Call nativeSetAngleInfo() with
-        // the application package name and ANGLE features to use.
+        // System ANGLE always exists, call nativeSetAngleInfo() with the application package
+        // name and ANGLE features to use.
         final String[] features = getAngleEglFeatures(context, bundle);
         nativeSetAngleInfo(SYSTEM_ANGLE_STRING, false, packageName, features);
         return true;
diff --git a/core/java/android/security/OWNERS b/core/java/android/security/OWNERS
index 96c0be7..33a67ae 100644
--- a/core/java/android/security/OWNERS
+++ b/core/java/android/security/OWNERS
@@ -8,3 +8,4 @@
 per-file Confirmation*.java = file:/keystore/OWNERS
 per-file FileIntegrityManager.java = file:platform/system/security:/fsverity/OWNERS
 per-file IFileIntegrityService.aidl = file:platform/system/security:/fsverity/OWNERS
+per-file *.aconfig = victorhsieh@google.com
diff --git a/core/java/android/window/flags/OWNERS b/core/java/android/window/flags/OWNERS
new file mode 100644
index 0000000..fa81ee3
--- /dev/null
+++ b/core/java/android/window/flags/OWNERS
@@ -0,0 +1 @@
+per-file responsible_apis.aconfig = file:/BAL_OWNERS
\ No newline at end of file
diff --git a/core/tests/coretests/src/android/app/OWNERS b/core/tests/coretests/src/android/app/OWNERS
index 64f5e6c..5636f9b 100644
--- a/core/tests/coretests/src/android/app/OWNERS
+++ b/core/tests/coretests/src/android/app/OWNERS
@@ -10,3 +10,7 @@
 
 # KeyguardManagerTest
 per-file KeyguardManagerTest.java = file:/services/core/java/com/android/server/locksettings/OWNERS
+
+# Files related to background activity launches
+per-file Background*Start* = file:/BAL_OWNERS
+
diff --git a/keystore/java/android/security/keystore/KeyGenParameterSpec.java b/keystore/java/android/security/keystore/KeyGenParameterSpec.java
index 1ba41b1..b714035 100644
--- a/keystore/java/android/security/keystore/KeyGenParameterSpec.java
+++ b/keystore/java/android/security/keystore/KeyGenParameterSpec.java
@@ -1596,6 +1596,8 @@
          * {@link #getAttestationChallenge()} returns non-null and the spec is used to generate a
          * symmetric (AES or HMAC) key, {@link javax.crypto.KeyGenerator#generateKey()} will throw
          * {@link java.security.InvalidAlgorithmParameterException}.
+         *
+         * <p>The challenge may be up to 128 bytes.
          */
         @NonNull
         public Builder setAttestationChallenge(byte[] attestationChallenge) {
diff --git a/media/jni/Android.bp b/media/jni/Android.bp
index ed1072c..6031ef7 100644
--- a/media/jni/Android.bp
+++ b/media/jni/Android.bp
@@ -81,6 +81,7 @@
         "libhidlallocatorutils",
         "libhidlbase",
         "libsonivox",
+        "server_configurable_flags",
         "android.hardware.cas@1.0",
         "android.hardware.cas.native@1.0",
         "android.hardware.drm@1.3",
@@ -99,6 +100,7 @@
     static_libs: [
         "libgrallocusage",
         "libmedia_midiiowrapper",
+        "android.media.playback.flags-aconfig-cc",
     ],
 
     include_dirs: [
diff --git a/media/jni/android_media_MediaMetadataRetriever.cpp b/media/jni/android_media_MediaMetadataRetriever.cpp
index 1458758..2a10fa7 100644
--- a/media/jni/android_media_MediaMetadataRetriever.cpp
+++ b/media/jni/android_media_MediaMetadataRetriever.cpp
@@ -35,7 +35,9 @@
 #include "android_media_MediaDataSource.h"
 #include "android_media_Streams.h"
 #include "android_util_Binder.h"
+#include <com_android_media_playback_flags.h>
 
+namespace playback_flags = com::android::media::playback::flags;
 using namespace android;
 
 struct fields_t {
@@ -374,9 +376,12 @@
         jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
         return NULL;
     }
-    // For getFrameAtTime family of calls, default to ANDROID_BITMAP_FORMAT_RGB_565
-    // to keep the behavior consistent with older releases
-    AndroidBitmapFormat colorFormat = getColorFormat(env, params, ANDROID_BITMAP_FORMAT_RGB_565);
+
+    AndroidBitmapFormat defaultColorFormat =
+            playback_flags::mediametadataretriever_default_rgba8888()
+            ? ANDROID_BITMAP_FORMAT_RGBA_8888
+            : ANDROID_BITMAP_FORMAT_RGB_565;
+    AndroidBitmapFormat colorFormat = getColorFormat(env, params, defaultColorFormat);
 
     // Call native method to retrieve a video frame
     VideoFrame *videoFrame = NULL;
diff --git a/media/jni/playback_flags.aconfig b/media/jni/playback_flags.aconfig
new file mode 100644
index 0000000..2bb0ec5
--- /dev/null
+++ b/media/jni/playback_flags.aconfig
@@ -0,0 +1,8 @@
+package: "com.android.media.playback.flags"
+
+flag {
+  name: "mediametadataretriever_default_rgba8888"
+  namespace: "media_solutions"
+  description: "Change MediaMetadataRetriever to use RGBA8888 for bitmap handling by default."
+  bug: "298965955"
+}
diff --git a/media/tests/MediaFrameworkTest/Android.bp b/media/tests/MediaFrameworkTest/Android.bp
index bdd7afe..7a329bc 100644
--- a/media/tests/MediaFrameworkTest/Android.bp
+++ b/media/tests/MediaFrameworkTest/Android.bp
@@ -20,6 +20,8 @@
         "androidx.test.ext.junit",
         "androidx.test.rules",
         "android-ex-camera2",
+        "android.media.playback.flags-aconfig-java",
+        "flag-junit",
         "testables",
         "testng",
         "truth",
diff --git a/media/tests/MediaFrameworkTest/src/com/android/mediaframeworktest/unit/MediaMetadataRetrieverTest.java b/media/tests/MediaFrameworkTest/src/com/android/mediaframeworktest/unit/MediaMetadataRetrieverTest.java
index f70d2d1..e3d3897 100644
--- a/media/tests/MediaFrameworkTest/src/com/android/mediaframeworktest/unit/MediaMetadataRetrieverTest.java
+++ b/media/tests/MediaFrameworkTest/src/com/android/mediaframeworktest/unit/MediaMetadataRetrieverTest.java
@@ -16,19 +16,27 @@
 
 package com.android.mediaframeworktest.unit;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
 import android.graphics.Bitmap;
 import android.media.MediaMetadataRetriever;
+import android.platform.test.annotations.RequiresFlagsDisabled;
+import android.platform.test.annotations.RequiresFlagsEnabled;
+import android.platform.test.flag.junit.CheckFlagsRule;
+import android.platform.test.flag.junit.DeviceFlagsValueProvider;
 import android.test.suitebuilder.annotation.LargeTest;
 import android.test.suitebuilder.annotation.MediumTest;
 import android.util.Log;
 
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.media.playback.flags.Flags;
 import com.android.mediaframeworktest.MediaNames;
 import com.android.mediaframeworktest.MediaProfileReader;
 
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -40,6 +48,9 @@
 
     private static final String TAG = "MediaMetadataRetrieverTest";
 
+    @Rule
+    public final CheckFlagsRule mCheckFlagsRule = DeviceFlagsValueProvider.createCheckFlagsRule();
+
     // Test album art extraction.
     @MediumTest
     @Test
@@ -284,6 +295,34 @@
         assertTrue(!hasFailed);
     }
 
+    /** Test the thumbnail is generated when the default is set to RGBA8888 */
+    @MediumTest
+    // TODO(b/305160754) Remove the following annotation and use SetFlagsRule.enableFlags
+    @RequiresFlagsEnabled(Flags.FLAG_MEDIAMETADATARETRIEVER_DEFAULT_RGBA8888)
+    @Test
+    public void testGetFrameAtTimeWithRGBA8888Flag_Set() throws IOException {
+        try (MediaMetadataRetriever retriever = new MediaMetadataRetriever()) {
+            retriever.setDataSource(MediaNames.TEST_PATH_1);
+            Bitmap bitmap = retriever.getFrameAtTime(-1);
+            assertNotNull(bitmap);
+            assertEquals(Bitmap.Config.ARGB_8888, bitmap.getConfig());
+        }
+    }
+
+    /** Test the thumbnail is generated when the default is not set to RGBA8888 */
+    @MediumTest
+    // TODO(b/305160754) Remove the following annotation and use SetFlagsRule.disableFlags
+    @RequiresFlagsDisabled(Flags.FLAG_MEDIAMETADATARETRIEVER_DEFAULT_RGBA8888)
+    @Test
+    public void testGetFrameAtTimeWithRGBA8888Flag_Unset() throws IOException {
+        try (MediaMetadataRetriever retriever = new MediaMetadataRetriever()) {
+            retriever.setDataSource(MediaNames.TEST_PATH_1);
+            Bitmap bitmap = retriever.getFrameAtTime(-1);
+            assertNotNull(bitmap);
+            assertEquals(Bitmap.Config.RGB_565, bitmap.getConfig());
+        }
+    }
+
     // TODO:
     // Encode and test for the correct mix of metadata elements on a per-file basis?
     // We should be able to compare the actual returned metadata with the expected metadata
diff --git a/services/core/java/com/android/server/am/ActivityManagerShellCommand.java b/services/core/java/com/android/server/am/ActivityManagerShellCommand.java
index 2e45da3..d56448d 100644
--- a/services/core/java/com/android/server/am/ActivityManagerShellCommand.java
+++ b/services/core/java/com/android/server/am/ActivityManagerShellCommand.java
@@ -1174,7 +1174,7 @@
                 synchronized (mInternal.mOomAdjuster.mCachedAppOptimizer.mFreezerLock) {
                     app.mOptRecord.setFreezeSticky(isSticky);
                     mInternal.mOomAdjuster.mCachedAppOptimizer.unfreezeAppInternalLSP(app, 0,
-                            false);
+                            true);
                 }
             }
         }
diff --git a/services/core/java/com/android/server/wm/OWNERS b/services/core/java/com/android/server/wm/OWNERS
index f8c39d0..cd70447 100644
--- a/services/core/java/com/android/server/wm/OWNERS
+++ b/services/core/java/com/android/server/wm/OWNERS
@@ -18,5 +18,8 @@
 yunfanc@google.com
 wilsonshih@google.com
 
-per-file BackgroundActivityStartController.java = set noparent
-per-file BackgroundActivityStartController.java = brufino@google.com, topjohnwu@google.com, achim@google.com, ogunwale@google.com, louischang@google.com, lus@google.com
+# Files related to background activity launches
+per-file Background*Start* = set noparent
+per-file Background*Start* = file:/BAL_OWNERS
+per-file Background*Start* = ogunwale@google.com, louischang@google.com
+
diff --git a/services/core/java/com/android/server/wm/RootWindowContainer.java b/services/core/java/com/android/server/wm/RootWindowContainer.java
index 9a0e47d..eba9bf6 100644
--- a/services/core/java/com/android/server/wm/RootWindowContainer.java
+++ b/services/core/java/com/android/server/wm/RootWindowContainer.java
@@ -1637,8 +1637,8 @@
             return false;
         }
 
-        if (!StorageManager.isUserKeyUnlocked(mCurrentUser)) {
-            // Can't launch home on secondary display areas if device is still locked.
+        if (!StorageManager.isCeStorageUnlocked(mCurrentUser)) {
+            // Can't launch home on secondary display areas if CE storage is still locked.
             return false;
         }
 
diff --git a/services/core/java/com/android/server/wm/Task.java b/services/core/java/com/android/server/wm/Task.java
index 3063d46..46ca445 100644
--- a/services/core/java/com/android/server/wm/Task.java
+++ b/services/core/java/com/android/server/wm/Task.java
@@ -6510,11 +6510,11 @@
                 mActivityType = ACTIVITY_TYPE_STANDARD;
             }
 
-            if (mActivityType != ACTIVITY_TYPE_STANDARD
+            if (!DisplayContent.alwaysCreateRootTask(tda.getWindowingMode(), mActivityType)
                     && mActivityType != ACTIVITY_TYPE_UNDEFINED) {
-                // For now there can be only one root task of a particular non-standard activity
-                // type on a display. So, get that ignoring whatever windowing mode it is
-                // currently in.
+                // Only Recents or Standard activity types are allowed to have more than one
+                // root task on a display, this is independent of whatever windowing mode it
+                // is currently in.
                 Task rootTask = tda.getRootTask(WINDOWING_MODE_UNDEFINED, mActivityType);
                 if (rootTask != null) {
                     throw new IllegalArgumentException("Root task=" + rootTask + " of activityType="
diff --git a/services/tests/wmtests/src/com/android/server/wm/RootWindowContainerTests.java b/services/tests/wmtests/src/com/android/server/wm/RootWindowContainerTests.java
index 3bc6450..b92cc64 100644
--- a/services/tests/wmtests/src/com/android/server/wm/RootWindowContainerTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/RootWindowContainerTests.java
@@ -870,7 +870,7 @@
                 new TestDisplayContent.Builder(mAtm, 1000, 1500)
                         .setSystemDecorations(true).build();
 
-        // Use invalid user id to let StorageManager.isUserKeyUnlocked() return false.
+        // Use invalid user id to let StorageManager.isCeStorageUnlocked() return false.
         final int currentUser = mRootWindowContainer.mCurrentUser;
         mRootWindowContainer.mCurrentUser = -1;
 
diff --git a/telecomm/java/android/telecom/TelecomManager.java b/telecomm/java/android/telecom/TelecomManager.java
index a72f780..89ef523 100644
--- a/telecomm/java/android/telecom/TelecomManager.java
+++ b/telecomm/java/android/telecom/TelecomManager.java
@@ -2352,6 +2352,11 @@
      * <p>
      * <b>Note</b>: {@link android.app.Notification.CallStyle} notifications should be posted after
      * the call is placed in order for the notification to be non-dismissible.
+     * <p><b>Note</b>: Call Forwarding MMI codes can only be dialed by applications that are
+     * configured as the user defined default dialer or system dialer role. If a call containing a
+     * call forwarding MMI code is placed by an application that is not in one of these roles, the
+     * dialer will be launched with a UI showing the MMI code already populated so that the user can
+     * confirm the action before the call is placed.
      * @param address The address to make the call to.
      * @param extras Bundle of extras to use with the call.
      */
diff --git a/tools/aapt2/Android.bp b/tools/aapt2/Android.bp
index 0d6dc35..ed3e1ac 100644
--- a/tools/aapt2/Android.bp
+++ b/tools/aapt2/Android.bp
@@ -121,7 +121,6 @@
         "link/AutoVersioner.cpp",
         "link/ManifestFixer.cpp",
         "link/NoDefaultResourceRemover.cpp",
-        "link/ProductFilter.cpp",
         "link/PrivateAttributeMover.cpp",
         "link/ReferenceLinker.cpp",
         "link/ResourceExcluder.cpp",
@@ -134,6 +133,7 @@
         "optimize/ResourceFilter.cpp",
         "optimize/Obfuscator.cpp",
         "optimize/VersionCollapser.cpp",
+        "process/ProductFilter.cpp",
         "process/SymbolTable.cpp",
         "split/TableSplitter.cpp",
         "text/Printer.cpp",
diff --git a/tools/aapt2/cmd/Compile.cpp b/tools/aapt2/cmd/Compile.cpp
index 03f9715..bb7b13a 100644
--- a/tools/aapt2/cmd/Compile.cpp
+++ b/tools/aapt2/cmd/Compile.cpp
@@ -45,6 +45,7 @@
 #include "io/StringStream.h"
 #include "io/Util.h"
 #include "io/ZipArchive.h"
+#include "process/ProductFilter.h"
 #include "trace/TraceBuffer.h"
 #include "util/Files.h"
 #include "util/Util.h"
@@ -179,6 +180,15 @@
     if (!res_parser.Parse(&xml_parser)) {
       return false;
     }
+
+    if (options.product_.has_value()) {
+      if (!ProductFilter({*options.product_}, /* remove_default_config_values = */ true)
+               .Consume(context, &table)) {
+        context->GetDiagnostics()->Error(android::DiagMessage(path_data.source)
+                                         << "failed to filter product");
+        return false;
+      }
+    }
   }
 
   if (options.pseudolocalize && translatable_file) {
diff --git a/tools/aapt2/cmd/Compile.h b/tools/aapt2/cmd/Compile.h
index 14a730a..984d890 100644
--- a/tools/aapt2/cmd/Compile.h
+++ b/tools/aapt2/cmd/Compile.h
@@ -42,6 +42,7 @@
   // See comments on aapt::ResourceParserOptions.
   bool preserve_visibility_of_styleables = false;
   bool verbose = false;
+  std::optional<std::string> product_;
 };
 
 /** Parses flags and compiles resources to be used in linking.  */
@@ -76,6 +77,10 @@
     AddOptionalFlag("--source-path",
                       "Sets the compiled resource file source file path to the given string.",
                       &options_.source_path);
+    AddOptionalFlag("--filter-product",
+                    "Leave only resources specific to the given product. All "
+                    "other resources (including defaults) are removed.",
+                    &options_.product_);
   }
 
   int Action(const std::vector<std::string>& args) override;
diff --git a/tools/aapt2/cmd/Link.cpp b/tools/aapt2/cmd/Link.cpp
index 97404fc..f00be36 100644
--- a/tools/aapt2/cmd/Link.cpp
+++ b/tools/aapt2/cmd/Link.cpp
@@ -66,6 +66,7 @@
 #include "optimize/ResourceDeduper.h"
 #include "optimize/VersionCollapser.h"
 #include "process/IResourceTableConsumer.h"
+#include "process/ProductFilter.h"
 #include "process/SymbolTable.h"
 #include "split/TableSplitter.h"
 #include "trace/TraceBuffer.h"
@@ -2127,7 +2128,7 @@
                                          << "can't select products when building static library");
       }
     } else {
-      ProductFilter product_filter(options_.products);
+      ProductFilter product_filter(options_.products, /* remove_default_config_values = */ false);
       if (!product_filter.Consume(context_, &final_table_)) {
         context_->GetDiagnostics()->Error(android::DiagMessage() << "failed stripping products");
         return 1;
diff --git a/tools/aapt2/link/Linkers.h b/tools/aapt2/link/Linkers.h
index 44cd276..18165f7 100644
--- a/tools/aapt2/link/Linkers.h
+++ b/tools/aapt2/link/Linkers.h
@@ -20,12 +20,12 @@
 #include <set>
 #include <unordered_set>
 
-#include "android-base/macros.h"
-#include "androidfw/ConfigDescription.h"
-#include "androidfw/StringPiece.h"
-
 #include "Resource.h"
 #include "SdkConstants.h"
+#include "android-base/macros.h"
+#include "android-base/result.h"
+#include "androidfw/ConfigDescription.h"
+#include "androidfw/StringPiece.h"
 #include "process/IResourceTableConsumer.h"
 #include "xml/XmlDom.h"
 
@@ -92,28 +92,6 @@
   DISALLOW_COPY_AND_ASSIGN(PrivateAttributeMover);
 };
 
-class ResourceConfigValue;
-
-class ProductFilter : public IResourceTableConsumer {
- public:
-  using ResourceConfigValueIter = std::vector<std::unique_ptr<ResourceConfigValue>>::iterator;
-
-  explicit ProductFilter(std::unordered_set<std::string> products) : products_(products) {
-  }
-
-  ResourceConfigValueIter SelectProductToKeep(const ResourceNameRef& name,
-                                              const ResourceConfigValueIter begin,
-                                              const ResourceConfigValueIter end,
-                                              android::IDiagnostics* diag);
-
-  bool Consume(IAaptContext* context, ResourceTable* table) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ProductFilter);
-
-  std::unordered_set<std::string> products_;
-};
-
 // Removes namespace nodes and URI information from the XmlResource.
 //
 // Once an XmlResource is processed by this consumer, it is no longer able to have its attributes
diff --git a/tools/aapt2/link/ProductFilter_test.cpp b/tools/aapt2/link/ProductFilter_test.cpp
deleted file mode 100644
index 2cb9afa..0000000
--- a/tools/aapt2/link/ProductFilter_test.cpp
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "link/Linkers.h"
-
-#include "test/Test.h"
-
-using ::android::ConfigDescription;
-
-namespace aapt {
-
-TEST(ProductFilterTest, SelectTwoProducts) {
-  std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
-
-  const ConfigDescription land = test::ParseConfigOrDie("land");
-  const ConfigDescription port = test::ParseConfigOrDie("port");
-
-  ResourceTable table;
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("land/default.xml")).Build(),
-                    land)
-          .Build(),
-      context->GetDiagnostics()));
-
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("land/tablet.xml")).Build(),
-                    land, "tablet")
-          .Build(),
-      context->GetDiagnostics()));
-
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("port/default.xml")).Build(),
-                    port)
-          .Build(),
-      context->GetDiagnostics()));
-
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("port/tablet.xml")).Build(),
-                    port, "tablet")
-          .Build(),
-      context->GetDiagnostics()));
-
-  ProductFilter filter({"tablet"});
-  ASSERT_TRUE(filter.Consume(context.get(), &table));
-
-  EXPECT_EQ(nullptr, test::GetValueForConfigAndProduct<Id>(
-                         &table, "android:string/one", land, ""));
-  EXPECT_NE(nullptr, test::GetValueForConfigAndProduct<Id>(
-                         &table, "android:string/one", land, "tablet"));
-  EXPECT_EQ(nullptr, test::GetValueForConfigAndProduct<Id>(
-                         &table, "android:string/one", port, ""));
-  EXPECT_NE(nullptr, test::GetValueForConfigAndProduct<Id>(
-                         &table, "android:string/one", port, "tablet"));
-}
-
-TEST(ProductFilterTest, SelectDefaultProduct) {
-  std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
-
-  ResourceTable table;
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("default.xml")).Build())
-          .Build(),
-      context->GetDiagnostics()));
-
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("tablet.xml")).Build(), {},
-                    "tablet")
-          .Build(),
-      context->GetDiagnostics()));
-  ;
-
-  ProductFilter filter(std::unordered_set<std::string>{});
-  ASSERT_TRUE(filter.Consume(context.get(), &table));
-
-  EXPECT_NE(nullptr, test::GetValueForConfigAndProduct<Id>(
-                         &table, "android:string/one",
-                         ConfigDescription::DefaultConfig(), ""));
-  EXPECT_EQ(nullptr, test::GetValueForConfigAndProduct<Id>(
-                         &table, "android:string/one",
-                         ConfigDescription::DefaultConfig(), "tablet"));
-}
-
-TEST(ProductFilterTest, FailOnAmbiguousProduct) {
-  std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
-
-  ResourceTable table;
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("default.xml")).Build())
-          .Build(),
-      context->GetDiagnostics()));
-
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("tablet.xml")).Build(), {},
-                    "tablet")
-          .Build(),
-      context->GetDiagnostics()));
-
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("no-sdcard.xml")).Build(),
-                    {}, "no-sdcard")
-          .Build(),
-      context->GetDiagnostics()));
-
-  ProductFilter filter({"tablet", "no-sdcard"});
-  ASSERT_FALSE(filter.Consume(context.get(), &table));
-}
-
-TEST(ProductFilterTest, FailOnMultipleDefaults) {
-  std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
-
-  ResourceTable table;
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source(".xml")).Build())
-          .Build(),
-      context->GetDiagnostics()));
-
-  ASSERT_TRUE(table.AddResource(
-      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
-          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("default.xml")).Build(), {},
-                    "default")
-          .Build(),
-      context->GetDiagnostics()));
-
-  ProductFilter filter(std::unordered_set<std::string>{});
-  ASSERT_FALSE(filter.Consume(context.get(), &table));
-}
-
-}  // namespace aapt
diff --git a/tools/aapt2/link/ProductFilter.cpp b/tools/aapt2/process/ProductFilter.cpp
similarity index 60%
rename from tools/aapt2/link/ProductFilter.cpp
rename to tools/aapt2/process/ProductFilter.cpp
index 9544986..0b1c0a6 100644
--- a/tools/aapt2/link/ProductFilter.cpp
+++ b/tools/aapt2/process/ProductFilter.cpp
@@ -14,16 +14,18 @@
  * limitations under the License.
  */
 
-#include "link/Linkers.h"
+#include "process/ProductFilter.h"
+
+#include <algorithm>
 
 #include "ResourceTable.h"
 #include "trace/TraceBuffer.h"
 
 namespace aapt {
 
-ProductFilter::ResourceConfigValueIter ProductFilter::SelectProductToKeep(
-    const ResourceNameRef& name, const ResourceConfigValueIter begin,
-    const ResourceConfigValueIter end, android::IDiagnostics* diag) {
+std::optional<ProductFilter::ResourceConfigValueIter> ProductFilter::SelectProductToKeep(
+    const ResourceNameRef& name, ResourceConfigValueIter begin, ResourceConfigValueIter end,
+    android::IDiagnostics* diag) {
   ResourceConfigValueIter default_product_iter = end;
   ResourceConfigValueIter selected_product_iter = end;
 
@@ -36,12 +38,11 @@
                     << "selection of product '" << config_value->product << "' for resource "
                     << name << " is ambiguous");
 
-        ResourceConfigValue* previously_selected_config_value =
-            selected_product_iter->get();
+        ResourceConfigValue* previously_selected_config_value = selected_product_iter->get();
         diag->Note(android::DiagMessage(previously_selected_config_value->value->GetSource())
                    << "product '" << previously_selected_config_value->product
                    << "' is also a candidate");
-        return end;
+        return std::nullopt;
       }
 
       // Select this product.
@@ -54,11 +55,10 @@
         diag->Error(android::DiagMessage(config_value->value->GetSource())
                     << "multiple default products defined for resource " << name);
 
-        ResourceConfigValue* previously_default_config_value =
-            default_product_iter->get();
+        ResourceConfigValue* previously_default_config_value = default_product_iter->get();
         diag->Note(android::DiagMessage(previously_default_config_value->value->GetSource())
                    << "default product also defined here");
-        return end;
+        return std::nullopt;
       }
 
       // Mark the default.
@@ -66,9 +66,16 @@
     }
   }
 
+  if (remove_default_config_values_) {
+    // If we are leaving only a specific product, return early here instead of selecting the default
+    // value. Returning end here will cause this value set to be skipped, and will be removed with
+    // ClearEmptyValues method.
+    return selected_product_iter;
+  }
+
   if (default_product_iter == end) {
     diag->Error(android::DiagMessage() << "no default product defined for resource " << name);
-    return end;
+    return std::nullopt;
   }
 
   if (selected_product_iter == end) {
@@ -89,20 +96,27 @@
         ResourceConfigValueIter start_range_iter = iter;
         while (iter != entry->values.end()) {
           ++iter;
-          if (iter == entry->values.end() ||
-              (*iter)->config != (*start_range_iter)->config) {
+          if (iter == entry->values.end() || (*iter)->config != (*start_range_iter)->config) {
             // End of the array, or we saw a different config,
             // so this must be the end of a range of products.
             // Select the product to keep from the set of products defined.
             ResourceNameRef name(pkg->name, type->named_type, entry->name);
-            auto value_to_keep = SelectProductToKeep(
-                name, start_range_iter, iter, context->GetDiagnostics());
-            if (value_to_keep == iter) {
+            auto value_to_keep =
+                SelectProductToKeep(name, start_range_iter, iter, context->GetDiagnostics());
+            if (!value_to_keep.has_value()) {
               // An error occurred, we could not pick a product.
               error = true;
-            } else {
+            } else if (auto val = value_to_keep.value(); val != iter) {
               // We selected a product to keep. Move it to the new array.
-              new_values.push_back(std::move(*value_to_keep));
+              if (remove_default_config_values_) {
+                // We are filtering values with the given product. The selected value here will be
+                // a new default value, and all other values will be removed.
+                new_values.push_back(
+                    std::make_unique<ResourceConfigValue>((*val)->config, android::StringPiece{}));
+                new_values.back()->value = std::move((*val)->value);
+              } else {
+                new_values.push_back(std::move(*val));
+              }
             }
 
             // Start the next range of products.
@@ -115,7 +129,27 @@
       }
     }
   }
+
+  if (remove_default_config_values_) {
+    ClearEmptyValues(table);
+  }
+
   return !error;
 }
 
+void ProductFilter::ClearEmptyValues(ResourceTable* table) {
+  // Clear any empty packages/types/entries, as remove_default_config_values_ may remove an entire
+  // value set.
+  CHECK(remove_default_config_values_)
+      << __func__ << " should only be called when remove_default_config_values_ is set";
+
+  for (auto& pkg : table->packages) {
+    for (auto& type : pkg->types) {
+      std::erase_if(type->entries, [](auto& entry) { return entry->values.empty(); });
+    }
+    std::erase_if(pkg->types, [](auto& type) { return type->entries.empty(); });
+  }
+  std::erase_if(table->packages, [](auto& package) { return package->types.empty(); });
+}
+
 }  // namespace aapt
diff --git a/tools/aapt2/process/ProductFilter.h b/tools/aapt2/process/ProductFilter.h
new file mode 100644
index 0000000..0ec2f00
--- /dev/null
+++ b/tools/aapt2/process/ProductFilter.h
@@ -0,0 +1,65 @@
+#pragma once
+
+#include <memory>
+#include <optional>
+#include <string>
+#include <unordered_set>
+#include <utility>
+#include <vector>
+
+#include "Resource.h"
+#include "android-base/macros.h"
+#include "androidfw/ConfigDescription.h"
+#include "androidfw/IDiagnostics.h"
+#include "process/IResourceTableConsumer.h"
+
+namespace aapt {
+
+class ResourceConfigValue;
+
+class ProductFilter : public IResourceTableConsumer {
+ public:
+  using ResourceConfigValueIter = std::vector<std::unique_ptr<ResourceConfigValue>>::iterator;
+
+  // Setting remove_default_config_values will remove all values other than
+  // specified product, including default. For example, if the following table
+  //
+  //     <string name="foo" product="default">foo_default</string>
+  //     <string name="foo" product="tablet">foo_tablet</string>
+  //     <string name="bar">bar</string>
+  //
+  // is consumed with tablet, it will result in
+  //
+  //     <string name="foo">foo_tablet</string>
+  //
+  // removing foo_default and bar. This option is to generate an RRO package
+  // with given product.
+  explicit ProductFilter(std::unordered_set<std::string> products,
+                         bool remove_default_config_values)
+      : products_(std::move(products)),
+        remove_default_config_values_(remove_default_config_values) {
+  }
+
+  bool Consume(IAaptContext* context, ResourceTable* table) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ProductFilter);
+
+  // SelectProductToKeep returns an iterator for the selected value.
+  //
+  // Returns std::nullopt in case of failure (e.g. ambiguous values, missing or duplicated default
+  // values).
+  // Returns `end` if keep_as_default_product is set and no value for the specified product was
+  // found.
+  std::optional<ResourceConfigValueIter> SelectProductToKeep(const ResourceNameRef& name,
+                                                             ResourceConfigValueIter begin,
+                                                             ResourceConfigValueIter end,
+                                                             android::IDiagnostics* diag);
+
+  void ClearEmptyValues(ResourceTable* table);
+
+  std::unordered_set<std::string> products_;
+  bool remove_default_config_values_;
+};
+
+}  // namespace aapt
diff --git a/tools/aapt2/process/ProductFilter_test.cpp b/tools/aapt2/process/ProductFilter_test.cpp
new file mode 100644
index 0000000..27a82dc
--- /dev/null
+++ b/tools/aapt2/process/ProductFilter_test.cpp
@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "process/ProductFilter.h"
+
+#include "test/Test.h"
+
+using ::android::ConfigDescription;
+
+namespace aapt {
+
+TEST(ProductFilterTest, SelectTwoProducts) {
+  std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
+
+  const ConfigDescription land = test::ParseConfigOrDie("land");
+  const ConfigDescription port = test::ParseConfigOrDie("port");
+
+  ResourceTable table;
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("land/default.xml")).Build(),
+                    land)
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("land/tablet.xml")).Build(),
+                    land, "tablet")
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("port/default.xml")).Build(),
+                    port)
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("port/tablet.xml")).Build(),
+                    port, "tablet")
+          .Build(),
+      context->GetDiagnostics()));
+
+  ProductFilter filter({"tablet"}, /* remove_default_config_values = */ false);
+  ASSERT_TRUE(filter.Consume(context.get(), &table));
+
+  EXPECT_EQ(nullptr, test::GetValueForConfigAndProduct<Id>(&table, "android:string/one", land, ""));
+  EXPECT_NE(nullptr,
+            test::GetValueForConfigAndProduct<Id>(&table, "android:string/one", land, "tablet"));
+  EXPECT_EQ(nullptr, test::GetValueForConfigAndProduct<Id>(&table, "android:string/one", port, ""));
+  EXPECT_NE(nullptr,
+            test::GetValueForConfigAndProduct<Id>(&table, "android:string/one", port, "tablet"));
+}
+
+TEST(ProductFilterTest, SelectDefaultProduct) {
+  std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
+
+  ResourceTable table;
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("default.xml")).Build())
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("tablet.xml")).Build(), {},
+                    "tablet")
+          .Build(),
+      context->GetDiagnostics()));
+  ;
+
+  ProductFilter filter(std::unordered_set<std::string>{},
+                       /* remove_default_config_values = */ false);
+  ASSERT_TRUE(filter.Consume(context.get(), &table));
+
+  EXPECT_NE(nullptr, test::GetValueForConfigAndProduct<Id>(&table, "android:string/one",
+                                                           ConfigDescription::DefaultConfig(), ""));
+  EXPECT_EQ(nullptr,
+            test::GetValueForConfigAndProduct<Id>(&table, "android:string/one",
+                                                  ConfigDescription::DefaultConfig(), "tablet"));
+}
+
+TEST(ProductFilterTest, FailOnAmbiguousProduct) {
+  std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
+
+  ResourceTable table;
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("default.xml")).Build())
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("tablet.xml")).Build(), {},
+                    "tablet")
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("no-sdcard.xml")).Build(),
+                    {}, "no-sdcard")
+          .Build(),
+      context->GetDiagnostics()));
+
+  ProductFilter filter({"tablet", "no-sdcard"}, /* remove_default_config_values = */ false);
+  ASSERT_FALSE(filter.Consume(context.get(), &table));
+}
+
+TEST(ProductFilterTest, FailOnMultipleDefaults) {
+  std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
+
+  ResourceTable table;
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source(".xml")).Build())
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("default.xml")).Build(), {},
+                    "default")
+          .Build(),
+      context->GetDiagnostics()));
+
+  ProductFilter filter(std::unordered_set<std::string>{},
+                       /* remove_default_config_values = */ false);
+  ASSERT_FALSE(filter.Consume(context.get(), &table));
+}
+
+TEST(ProductFilterTest, RemoveDefaultConfigValues) {
+  std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
+
+  const ConfigDescription land = test::ParseConfigOrDie("land");
+  const ConfigDescription port = test::ParseConfigOrDie("port");
+
+  ResourceTable table;
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("land/default.xml")).Build(),
+                    land)
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("land/tablet.xml")).Build(),
+                    land, "tablet")
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/two"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("land/default.xml")).Build(),
+                    land)
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("port/default.xml")).Build(),
+                    port)
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/one"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("port/tablet.xml")).Build(),
+                    port, "tablet")
+          .Build(),
+      context->GetDiagnostics()));
+
+  ASSERT_TRUE(table.AddResource(
+      NewResourceBuilder(test::ParseNameOrDie("android:string/two"))
+          .SetValue(test::ValueBuilder<Id>().SetSource(android::Source("port/default.xml")).Build(),
+                    port)
+          .Build(),
+      context->GetDiagnostics()));
+
+  ProductFilter filter({"tablet"}, /* remove_default_config_values = */ true);
+  ASSERT_TRUE(filter.Consume(context.get(), &table));
+
+  EXPECT_NE(nullptr, test::GetValueForConfigAndProduct<Id>(&table, "android:string/one", land, ""));
+  EXPECT_EQ(nullptr, test::GetValueForConfigAndProduct<Id>(&table, "android:string/two", land, ""));
+  EXPECT_NE(nullptr, test::GetValueForConfigAndProduct<Id>(&table, "android:string/one", port, ""));
+  EXPECT_EQ(nullptr, test::GetValueForConfigAndProduct<Id>(&table, "android:string/two", port, ""));
+}
+
+}  // namespace aapt
diff --git a/tools/lint/global/checks/src/main/java/com/google/android/lint/AndroidGlobalIssueRegistry.kt b/tools/lint/global/checks/src/main/java/com/google/android/lint/AndroidGlobalIssueRegistry.kt
index a20266a..28eab8f 100644
--- a/tools/lint/global/checks/src/main/java/com/google/android/lint/AndroidGlobalIssueRegistry.kt
+++ b/tools/lint/global/checks/src/main/java/com/google/android/lint/AndroidGlobalIssueRegistry.kt
@@ -20,7 +20,6 @@
 import com.android.tools.lint.client.api.Vendor
 import com.android.tools.lint.detector.api.CURRENT_API
 import com.google.android.lint.aidl.EnforcePermissionDetector
-import com.google.android.lint.aidl.EnforcePermissionHelperDetector
 import com.google.android.lint.aidl.SimpleManualPermissionEnforcementDetector
 import com.google.auto.service.AutoService
 
@@ -30,7 +29,8 @@
     override val issues = listOf(
             EnforcePermissionDetector.ISSUE_MISSING_ENFORCE_PERMISSION,
             EnforcePermissionDetector.ISSUE_MISMATCHING_ENFORCE_PERMISSION,
-            EnforcePermissionHelperDetector.ISSUE_ENFORCE_PERMISSION_HELPER,
+            EnforcePermissionDetector.ISSUE_ENFORCE_PERMISSION_HELPER,
+            EnforcePermissionDetector.ISSUE_MISUSING_ENFORCE_PERMISSION,
             SimpleManualPermissionEnforcementDetector.ISSUE_SIMPLE_MANUAL_PERMISSION_ENFORCEMENT,
     )
 
@@ -45,4 +45,4 @@
             feedbackUrl = "http://b/issues/new?component=315013",
             contact = "repsonsible-apis@google.com"
     )
-}
\ No newline at end of file
+}
diff --git a/tools/lint/global/checks/src/main/java/com/google/android/lint/aidl/EnforcePermissionDetector.kt b/tools/lint/global/checks/src/main/java/com/google/android/lint/aidl/EnforcePermissionDetector.kt
index 0baac2c..a74400d 100644
--- a/tools/lint/global/checks/src/main/java/com/google/android/lint/aidl/EnforcePermissionDetector.kt
+++ b/tools/lint/global/checks/src/main/java/com/google/android/lint/aidl/EnforcePermissionDetector.kt
@@ -30,29 +30,34 @@
 import com.android.tools.lint.detector.api.Scope
 import com.android.tools.lint.detector.api.Severity
 import com.android.tools.lint.detector.api.SourceCodeScanner
+import com.google.android.lint.findCallExpression
 import com.intellij.psi.PsiAnnotation
 import com.intellij.psi.PsiArrayInitializerMemberValue
 import com.intellij.psi.PsiClass
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiMethod
-import org.jetbrains.uast.UAnnotation
+import org.jetbrains.uast.UBlockExpression
+import org.jetbrains.uast.UDeclarationsExpression
 import org.jetbrains.uast.UElement
+import org.jetbrains.uast.UExpression
 import org.jetbrains.uast.UMethod
-import org.jetbrains.uast.toUElement
+import org.jetbrains.uast.skipParenthesizedExprDown
+
+import java.util.EnumSet
 
 /**
- * Lint Detector that ensures that any method overriding a method annotated
- * with @EnforcePermission is also annotated with the exact same annotation.
- * The intent is to surface the effective permission checks to the service
- * implementations.
+ * Lint Detector that ensures consistency when using the @EnforcePermission
+ * annotation. Multiple verifications are implemented:
  *
- * This is done with 2 mechanisms:
  *  1. Visit any annotation usage, to ensure that any derived class will have
- *     the correct annotation on each methods. This is for the top to bottom
- *     propagation.
- *  2. Visit any annotation, to ensure that if a method is annotated, it has
+ *     the correct annotation on each methods. Even if the subclass does not
+ *     have the annotation, visitAnnotationUsage will be called which allows us
+ *     to capture the issue.
+ *  2. Visit any method, to ensure that if a method is annotated, it has
  *     its ancestor also annotated. This is to avoid having an annotation on a
  *     Java method without the corresponding annotation on the AIDL interface.
+ *  3. When annotated, ensures that the first instruction is to call the helper
+ *     method (or the parent helper).
  */
 class EnforcePermissionDetector : Detector(), SourceCodeScanner {
 
@@ -60,9 +65,8 @@
         return listOf(ANNOTATION_ENFORCE_PERMISSION)
     }
 
-    override fun getApplicableUastTypes(): List<Class<out UElement>> {
-        return listOf(UAnnotation::class.java)
-    }
+    override fun getApplicableUastTypes(): List<Class<out UElement?>> =
+            listOf(UMethod::class.java)
 
     private fun annotationValueGetChildren(elem: PsiElement): Array<PsiElement> {
         if (elem is PsiArrayInitializerMemberValue)
@@ -121,11 +125,6 @@
         overriddenMethod: PsiMethod,
         checkEquivalence: Boolean = true
     ) {
-        // If method is not from a Stub subclass, this method shouldn't use @EP at all.
-        // This is handled by EnforcePermissionHelperDetector.
-        if (!isContainedInSubclassOfStub(context, overridingMethod.toUElement() as? UMethod)) {
-            return
-        }
         val overridingAnnotation = overridingMethod.getAnnotation(ANNOTATION_ENFORCE_PERMISSION)
         val overriddenAnnotation = overriddenMethod.getAnnotation(ANNOTATION_ENFORCE_PERMISSION)
         val location = context.getLocation(element)
@@ -161,40 +160,102 @@
     ) {
         if (usageInfo.type == AnnotationUsageType.METHOD_OVERRIDE &&
             annotationInfo.origin == AnnotationOrigin.METHOD) {
+            /* Ignore implementations that are not a sub-class of Stub (i.e., Proxy). */
+            val uMethod = element as? UMethod ?: return
+            if (!isContainedInSubclassOfStub(context, uMethod)) {
+                return
+            }
             val overridingMethod = element.sourcePsi as PsiMethod
             val overriddenMethod = usageInfo.referenced as PsiMethod
             compareMethods(context, element, overridingMethod, overriddenMethod)
         }
     }
 
-    override fun createUastHandler(context: JavaContext): UElementHandler {
-        return object : UElementHandler() {
-            override fun visitAnnotation(node: UAnnotation) {
-                if (node.qualifiedName != ANNOTATION_ENFORCE_PERMISSION) {
-                    return
-                }
-                val method = node.uastParent as? UMethod ?: return
-                val overridingMethod = method as PsiMethod
-                val parents = overridingMethod.findSuperMethods()
-                for (overriddenMethod in parents) {
-                    // The equivalence check can be skipped, if both methods are
-                    // annotated, it will be verified by visitAnnotationUsage.
-                    compareMethods(context, method, overridingMethod,
-                        overriddenMethod, checkEquivalence = false)
-                }
+    override fun createUastHandler(context: JavaContext): UElementHandler = AidlStubHandler(context)
+
+    private inner class AidlStubHandler(val context: JavaContext) : UElementHandler() {
+        override fun visitMethod(node: UMethod) {
+            if (context.evaluator.isAbstract(node)) return
+            if (!node.hasAnnotation(ANNOTATION_ENFORCE_PERMISSION)) return
+
+            if (!isContainedInSubclassOfStub(context, node)) {
+                context.report(
+                    ISSUE_MISUSING_ENFORCE_PERMISSION,
+                    node,
+                    context.getLocation(node),
+                    "The class of ${node.name} does not inherit from an AIDL generated Stub class"
+                )
+                return
+            }
+
+            /* Check that we are connected to the super class */
+            val overridingMethod = node as PsiMethod
+            val parents = overridingMethod.findSuperMethods()
+            for (overriddenMethod in parents) {
+                // The equivalence check can be skipped, if both methods are
+                // annotated, it will be verified by visitAnnotationUsage.
+                compareMethods(context, node, overridingMethod,
+                    overriddenMethod, checkEquivalence = false)
+            }
+
+            /* Check that the helper is called as a first instruction */
+            val targetExpression = getHelperMethodCallSourceString(node)
+            val message =
+                "Method must start with $targetExpression or super.${node.name}(), if applicable"
+
+            val firstExpression = (node.uastBody as? UBlockExpression)
+                    ?.expressions?.firstOrNull()
+
+            if (firstExpression == null) {
+                context.report(
+                    ISSUE_ENFORCE_PERMISSION_HELPER,
+                    context.getLocation(node),
+                    message,
+                )
+                return
+            }
+
+            val firstExpressionSource = firstExpression.skipParenthesizedExprDown()
+              .asSourceString()
+              .filterNot(Char::isWhitespace)
+
+            if (firstExpressionSource != targetExpression &&
+                  firstExpressionSource != "super.$targetExpression") {
+                // calling super.<methodName>() is also legal
+                val directSuper = context.evaluator.getSuperMethod(node)
+                val firstCall = findCallExpression(firstExpression)?.resolve()
+                if (directSuper != null && firstCall == directSuper) return
+
+                val locationTarget = getLocationTarget(firstExpression)
+                val expressionLocation = context.getLocation(locationTarget)
+
+                context.report(
+                    ISSUE_ENFORCE_PERMISSION_HELPER,
+                    context.getLocation(node),
+                    message,
+                    getHelperMethodFix(node, expressionLocation),
+                )
             }
         }
     }
 
     companion object {
+
+        private const val HELPER_SUFFIX = "_enforcePermission"
+
         val EXPLANATION = """
-            The @EnforcePermission annotation is used to indicate that the underlying binder code
-            has already verified the caller's permissions before calling the appropriate method. The
-            verification code is usually generated by the AIDL compiler, which also takes care of
-            annotating the generated Java code.
+            The @EnforcePermission annotation is used to delegate the verification of the caller's
+            permissions to a generated AIDL method.
 
             In order to surface that information to platform developers, the same annotation must be
             used on the implementation class or methods.
+
+            The @EnforcePermission annotation can only be used on methods whose class extends from
+            the Stub class generated by the AIDL compiler. When @EnforcePermission is applied, the
+            AIDL compiler generates a Stub method to do the permission check called yourMethodName$HELPER_SUFFIX.
+
+            yourMethodName$HELPER_SUFFIX must be executed before any other operation. To do that, you can
+            either call it directly, or call it indirectly via super.yourMethodName().
             """
 
         val ISSUE_MISSING_ENFORCE_PERMISSION: Issue = Issue.create(
@@ -206,7 +267,7 @@
             severity = Severity.ERROR,
             implementation = Implementation(
                     EnforcePermissionDetector::class.java,
-                    Scope.JAVA_FILE_SCOPE
+                    EnumSet.of(Scope.JAVA_FILE, Scope.TEST_SOURCES)
             )
         )
 
@@ -219,8 +280,47 @@
             severity = Severity.ERROR,
             implementation = Implementation(
                     EnforcePermissionDetector::class.java,
-                    Scope.JAVA_FILE_SCOPE
+                    EnumSet.of(Scope.JAVA_FILE, Scope.TEST_SOURCES)
             )
         )
+
+        val ISSUE_ENFORCE_PERMISSION_HELPER: Issue = Issue.create(
+            id = "MissingEnforcePermissionHelper",
+            briefDescription = """Missing permission-enforcing method call in AIDL method
+                |annotated with @EnforcePermission""".trimMargin(),
+            explanation = EXPLANATION,
+            category = Category.SECURITY,
+            priority = 6,
+            severity = Severity.ERROR,
+            implementation = Implementation(
+                    EnforcePermissionDetector::class.java,
+                    EnumSet.of(Scope.JAVA_FILE, Scope.TEST_SOURCES)
+            )
+        )
+
+        val ISSUE_MISUSING_ENFORCE_PERMISSION: Issue = Issue.create(
+            id = "MisusingEnforcePermissionAnnotation",
+            briefDescription = "@EnforcePermission cannot be used here",
+            explanation = EXPLANATION,
+            category = Category.SECURITY,
+            priority = 6,
+            severity = Severity.ERROR,
+            implementation = Implementation(
+                    EnforcePermissionDetector::class.java,
+                    EnumSet.of(Scope.JAVA_FILE, Scope.TEST_SOURCES)
+            )
+        )
+
+        /**
+         * handles an edge case with UDeclarationsExpression, where sourcePsi is null,
+         * resulting in an incorrect Location if used directly
+         */
+        private fun getLocationTarget(firstExpression: UExpression): PsiElement? {
+            if (firstExpression.sourcePsi != null) return firstExpression.sourcePsi
+            if (firstExpression is UDeclarationsExpression) {
+                return firstExpression.declarations.firstOrNull()?.sourcePsi
+            }
+            return null
+        }
     }
 }
diff --git a/tools/lint/global/checks/src/main/java/com/google/android/lint/aidl/EnforcePermissionHelperDetector.kt b/tools/lint/global/checks/src/main/java/com/google/android/lint/aidl/EnforcePermissionHelperDetector.kt
deleted file mode 100644
index df13af5..0000000
--- a/tools/lint/global/checks/src/main/java/com/google/android/lint/aidl/EnforcePermissionHelperDetector.kt
+++ /dev/null
@@ -1,149 +0,0 @@
-/*
- * Copyright (C) 2022 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.android.lint.aidl
-
-import com.android.tools.lint.client.api.UElementHandler
-import com.android.tools.lint.detector.api.Category
-import com.android.tools.lint.detector.api.Detector
-import com.android.tools.lint.detector.api.Implementation
-import com.android.tools.lint.detector.api.Issue
-import com.android.tools.lint.detector.api.JavaContext
-import com.android.tools.lint.detector.api.Scope
-import com.android.tools.lint.detector.api.Severity
-import com.android.tools.lint.detector.api.SourceCodeScanner
-import com.google.android.lint.findCallExpression
-import com.intellij.psi.PsiElement
-import org.jetbrains.uast.UBlockExpression
-import org.jetbrains.uast.UDeclarationsExpression
-import org.jetbrains.uast.UElement
-import org.jetbrains.uast.UExpression
-import org.jetbrains.uast.UMethod
-import org.jetbrains.uast.skipParenthesizedExprDown
-
-class EnforcePermissionHelperDetector : Detector(), SourceCodeScanner {
-    override fun getApplicableUastTypes(): List<Class<out UElement?>> =
-            listOf(UMethod::class.java)
-
-    override fun createUastHandler(context: JavaContext): UElementHandler = AidlStubHandler(context)
-
-    private inner class AidlStubHandler(val context: JavaContext) : UElementHandler() {
-        override fun visitMethod(node: UMethod) {
-            if (context.evaluator.isAbstract(node)) return
-            if (!node.hasAnnotation(ANNOTATION_ENFORCE_PERMISSION)) return
-
-            if (!isContainedInSubclassOfStub(context, node)) {
-                context.report(
-                    ISSUE_MISUSING_ENFORCE_PERMISSION,
-                    node,
-                    context.getLocation(node),
-                    "The class of ${node.name} does not inherit from an AIDL generated Stub class"
-                )
-                return
-            }
-
-            val targetExpression = getHelperMethodCallSourceString(node)
-            val message =
-                "Method must start with $targetExpression or super.${node.name}(), if applicable"
-
-            val firstExpression = (node.uastBody as? UBlockExpression)
-                    ?.expressions?.firstOrNull()
-
-            if (firstExpression == null) {
-                context.report(
-                    ISSUE_ENFORCE_PERMISSION_HELPER,
-                    context.getLocation(node),
-                    message,
-                )
-                return
-            }
-
-            val firstExpressionSource = firstExpression.skipParenthesizedExprDown()
-              .asSourceString()
-              .filterNot(Char::isWhitespace)
-
-            if (firstExpressionSource != targetExpression &&
-                  firstExpressionSource != "super.$targetExpression") {
-                // calling super.<methodName>() is also legal
-                val directSuper = context.evaluator.getSuperMethod(node)
-                val firstCall = findCallExpression(firstExpression)?.resolve()
-                if (directSuper != null && firstCall == directSuper) return
-
-                val locationTarget = getLocationTarget(firstExpression)
-                val expressionLocation = context.getLocation(locationTarget)
-
-                context.report(
-                    ISSUE_ENFORCE_PERMISSION_HELPER,
-                    context.getLocation(node),
-                    message,
-                    getHelperMethodFix(node, expressionLocation),
-                )
-            }
-        }
-    }
-
-    companion object {
-        private const val HELPER_SUFFIX = "_enforcePermission"
-
-        private const val EXPLANATION = """
-            The @EnforcePermission annotation can only be used on methods whose class extends from
-            the Stub class generated by the AIDL compiler. When @EnforcePermission is applied, the
-            AIDL compiler generates a Stub method to do the permission check called yourMethodName$HELPER_SUFFIX.
-
-            yourMethodName$HELPER_SUFFIX must be executed before any other operation. To do that, you can
-            either call it directly, or call it indirectly via super.yourMethodName().
-            """
-
-        val ISSUE_ENFORCE_PERMISSION_HELPER: Issue = Issue.create(
-                id = "MissingEnforcePermissionHelper",
-                briefDescription = """Missing permission-enforcing method call in AIDL method
-                    |annotated with @EnforcePermission""".trimMargin(),
-                explanation = EXPLANATION,
-                category = Category.SECURITY,
-                priority = 6,
-                severity = Severity.ERROR,
-                implementation = Implementation(
-                        EnforcePermissionHelperDetector::class.java,
-                        Scope.JAVA_FILE_SCOPE
-                )
-        )
-
-        val ISSUE_MISUSING_ENFORCE_PERMISSION: Issue = Issue.create(
-                id = "MisusingEnforcePermissionAnnotation",
-                briefDescription = "@EnforcePermission cannot be used here",
-                explanation = EXPLANATION,
-                category = Category.SECURITY,
-                priority = 6,
-                severity = Severity.ERROR,
-                implementation = Implementation(
-                        EnforcePermissionDetector::class.java,
-                        Scope.JAVA_FILE_SCOPE
-                )
-        )
-
-        /**
-         * handles an edge case with UDeclarationsExpression, where sourcePsi is null,
-         * resulting in an incorrect Location if used directly
-         */
-        private fun getLocationTarget(firstExpression: UExpression): PsiElement? {
-            if (firstExpression.sourcePsi != null) return firstExpression.sourcePsi
-            if (firstExpression is UDeclarationsExpression) {
-                return firstExpression.declarations.firstOrNull()?.sourcePsi
-            }
-            return null
-        }
-    }
-}
diff --git a/tools/lint/global/checks/src/test/java/com/google/android/lint/aidl/EnforcePermissionHelperDetectorCodegenTest.kt b/tools/lint/global/checks/src/test/java/com/google/android/lint/aidl/EnforcePermissionHelperDetectorCodegenTest.kt
index 5a63bb4..3ef02f8 100644
--- a/tools/lint/global/checks/src/test/java/com/google/android/lint/aidl/EnforcePermissionHelperDetectorCodegenTest.kt
+++ b/tools/lint/global/checks/src/test/java/com/google/android/lint/aidl/EnforcePermissionHelperDetectorCodegenTest.kt
@@ -25,10 +25,10 @@
 
 @Suppress("UnstableApiUsage")
 class EnforcePermissionHelperDetectorCodegenTest : LintDetectorTest() {
-    override fun getDetector(): Detector = EnforcePermissionHelperDetector()
+    override fun getDetector(): Detector = EnforcePermissionDetector()
 
     override fun getIssues(): List<Issue> = listOf(
-            EnforcePermissionHelperDetector.ISSUE_ENFORCE_PERMISSION_HELPER
+            EnforcePermissionDetector.ISSUE_ENFORCE_PERMISSION_HELPER
     )
 
     override fun lint(): TestLintTask = super.lint().allowMissingSdk(true)
diff --git a/tools/lint/global/checks/src/test/java/com/google/android/lint/aidl/EnforcePermissionHelperDetectorTest.kt b/tools/lint/global/checks/src/test/java/com/google/android/lint/aidl/EnforcePermissionHelperDetectorTest.kt
index 10a6e1d..64e2bfb 100644
--- a/tools/lint/global/checks/src/test/java/com/google/android/lint/aidl/EnforcePermissionHelperDetectorTest.kt
+++ b/tools/lint/global/checks/src/test/java/com/google/android/lint/aidl/EnforcePermissionHelperDetectorTest.kt
@@ -20,10 +20,10 @@
 import com.android.tools.lint.checks.infrastructure.TestLintTask
 
 class EnforcePermissionHelperDetectorTest : LintDetectorTest() {
-    override fun getDetector() = EnforcePermissionHelperDetector()
+    override fun getDetector() = EnforcePermissionDetector()
     override fun getIssues() = listOf(
-        EnforcePermissionHelperDetector.ISSUE_ENFORCE_PERMISSION_HELPER,
-        EnforcePermissionHelperDetector.ISSUE_MISUSING_ENFORCE_PERMISSION
+        EnforcePermissionDetector.ISSUE_ENFORCE_PERMISSION_HELPER,
+        EnforcePermissionDetector.ISSUE_MISUSING_ENFORCE_PERMISSION
     )
 
     override fun lint(): TestLintTask = super.lint().allowMissingSdk()