Mass clean up: don't cast class when not needed.

Bug: none
Test: rebuild
Change-Id: Ie3f58a3d5ae99ade28a33dcac80c18de90d4d5b2

src/com/android/settings/gestures/GesturePreferenceController.java

@@ -51,7 +51,7 @@ public abstract class GesturePreferenceController extends TogglePreferenceContro
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         if (isAvailable()) {
-            mVideoPreference = (VideoPreference) screen.findPreference(getVideoPrefKey());
+            mVideoPreference = screen.findPreference(getVideoPrefKey());
         }
     }