Change RECEIVE_BLUETOOTH_MAP permission to signature or system

Bug: 17954105
Change-Id: I8b16cab7193c97e5f54d6e4ef33ebf8cda0da197
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 937f83a..d7720a2 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -405,7 +405,7 @@
     <!-- @hide -->
     <permission android:name="android.permission.RECEIVE_BLUETOOTH_MAP"
         android:permissionGroup="android.permission-group.MESSAGES"
-        android:protectionLevel="dangerous"
+        android:protectionLevel="signature|system"
         android:label="@string/permlab_receiveBluetoothMap"
         android:description="@string/permdesc_receiveBluetoothMap" />