Fix overlapped problem in SuW two panes mode

- The previous preview page will overlap the right pane in RTL language.
- The root cause is the false value of the clipToPadding and
  clipChildren.
- Use the TTheme.DeviceDefault.Settings.

Fixes: 204955818
Test: manual test
Change-Id: I75c7f419cf93ebe9c4e9e3cb24835163a6b01e11

src/com/android/settings/display/PreviewPagerAdapter.java

@@ -109,10 +109,6 @@ public class PreviewPagerAdapter extends PagerAdapter {
         return (view == object);
     }
 
-    FrameLayout[] getPreviewFrames() {
-        return mPreviewFrames;
-    }
-
     boolean isAnimating() {
         return mAnimationCounter > 0;
     }