Fix 2385283: Add DevicePolicyManager calls to LockScreen.

src/com/android/settings/MediaFormat.java

@@ -147,7 +147,7 @@ public class MediaFormat extends Activity {
      * click in order to initiate a confirmation sequence.  This method is
      * called from various other points in the code to reset the activity to
      * this base state.
-     * 
+     *
      * <p>Reinflating views from resources is expensive and prevents us from
      * caching widget pointers, so we use a single-inflate pattern:  we lazy-
      * inflate each view, caching all of the widget pointers we'll need at the
@@ -172,7 +172,7 @@ public class MediaFormat extends Activity {
         mInitialView = null;
         mFinalView = null;
         mInflater = LayoutInflater.from(this);
-        mLockUtils = new LockPatternUtils(getContentResolver());
+        mLockUtils = new LockPatternUtils(this);
 
         establishInitialState();
     }