Define a label for A2DP Media Browser service

In order for applications to render A2DP SNK audio, they may require a
specific label for the streaming service in-stead of relying on the
application label.

Bug: b/28537735
Change-Id: If4e422160802ba578b0f38630b82462fcb619b33
(cherry picked from commit 00023aaf6c83190ae797cedf6878d4d076fa74a6)
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index c3ee7e4..f571355 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -309,7 +309,8 @@
             android:process="@string/process"
             android:name=".a2dpsink.mbs.A2dpMediaBrowserService"
             android:exported="true"
-            android:enabled="@bool/profile_supported_a2dp_sink">
+            android:enabled="@bool/profile_supported_a2dp_sink"
+            android:label="@string/a2dp_sink_mbs_label">
             <intent-filter>
                 <action android:name="android.media.browse.MediaBrowserService" />
             </intent-filter>