Add MediaRouter API.

This is just the initial state tracking. Still to go is
actually triggering Bluetooth A2DP correctly and tracking
process state in the system server.

Change-Id: I33031d52799d6e2d7208910da833831085cc3677
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index abd7e92..f1448a8 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -636,6 +636,12 @@
         android:permissionGroup="android.permission-group.SYSTEM_TOOLS"
         android:protectionLevel="signature" />
 
+    <!-- Allows an application to route media output to other devices. -->
+    <permission android:name="android.permission.ROUTE_MEDIA_OUTPUT"
+                android:permissionGroup="android.permission-group.SYSTEM_TOOLS"
+                android:label="@string/permlab_route_media_output"
+                android:description="@string/permdesc_route_media_output" />
+
     <!-- =========================================== -->
     <!-- Permissions associated with telephony state -->
     <!-- =========================================== -->