Fix Settings handling of UMS broadcasts.

Had to update the filter settings to accomodate the data scheme
sent with the broadcast.

bug:2504908
Change-Id: Idf07d3b6d408489735c55df5f3310551cf6192f5
diff --git a/src/com/android/settings/TetherSettings.java b/src/com/android/settings/TetherSettings.java
index 9d952ec..f49d577 100644
--- a/src/com/android/settings/TetherSettings.java
+++ b/src/com/android/settings/TetherSettings.java
@@ -106,11 +106,15 @@
         super.onResume();
 
         IntentFilter filter = new IntentFilter(ConnectivityManager.ACTION_TETHER_STATE_CHANGED);
-        filter.addAction(Intent.ACTION_MEDIA_SHARED);
-        filter.addAction(Intent.ACTION_MEDIA_UNSHARED);
         mTetherChangeReceiver = new TetherChangeReceiver();
         Intent intent = registerReceiver(mTetherChangeReceiver, filter);
 
+        filter = new IntentFilter();
+        filter.addAction(Intent.ACTION_MEDIA_SHARED);
+        filter.addAction(Intent.ACTION_MEDIA_UNSHARED);
+        filter.addDataScheme("file");
+        registerReceiver(mTetherChangeReceiver, filter);
+
         if (intent != null) mTetherChangeReceiver.onReceive(this, intent);
         mWifiApEnabler.resume();
     }