bluetooth: enable A2DP sink

* A2DP source and sink can coexist on Android 15.
  https://android-review.googlesource.com/q/topic:%22bt_a2dp_src_sink_coexist%22
* Fixes https://github.com/raspberry-vanilla/android_local_manifest/issues/188.

overlay/BluetoothRpiOverlay/Android.bp

@@ -0,0 +1,10 @@
+// Copyright (C) 2021-2022 KonstaKANG
+//
+// SPDX-License-Identifier: Apache-2.0
+
+runtime_resource_overlay {
+    name: "BluetoothRpiOverlay",
+    resource_dirs: ["res"],
+    sdk_version: "current",
+    proprietary: true
+}

overlay/BluetoothRpiOverlay/AndroidManifest.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+** Copyright (C) 2021-2022 KonstaKANG
+**
+** SPDX-License-Identifier: Apache-2.0
+*/
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.bluetooth.resources.rpi"
+    android:versionCode="1"
+    android:versionName="1.0">
+    <application android:hasCode="false" />
+    <overlay
+        android:targetPackage="com.android.bluetooth"
+        android:isStatic="true"
+        android:priority="0" />
+</manifest>

overlay/BluetoothRpiOverlay/res/values/config.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2009-2012 Broadcom Corporation
+     Copyright (C) 2021-2022 KonstaKANG
+
+     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.
+-->
+
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+
+    <!-- If true, device requests audio focus and start avrcp updates on source start or play -->
+    <bool name="a2dp_sink_automatically_request_audio_focus">true</bool>
+
+</resources>