Use RingtonePlayer to get ringtone title

Instead of requiring every application that calls Rintone.getTitle()
to request android.permission.READ_EXTERNAL_STORAGE, pass the call
through to the system UI process. We only do this for media store
URIs.

Bug: 22067670
Change-Id: I38cf3fb8d769ef6984c41a7b04afbbd4c57175ce
diff --git a/packages/SystemUI/src/com/android/systemui/media/RingtonePlayer.java b/packages/SystemUI/src/com/android/systemui/media/RingtonePlayer.java
index e9a256c..fe876d7 100644
--- a/packages/SystemUI/src/com/android/systemui/media/RingtonePlayer.java
+++ b/packages/SystemUI/src/com/android/systemui/media/RingtonePlayer.java
@@ -171,6 +171,13 @@
             }
             mAsyncPlayer.stop();
         }
+
+        @Override
+        public String getTitle(Uri uri) {
+            final UserHandle user = Binder.getCallingUserHandle();
+            return Ringtone.getTitle(getContextForUser(user), uri,
+                    false /*followSettingsUri*/, false /*allowRemote*/);
+        }
     };
 
     private Context getContextForUser(UserHandle user) {