Merge change 7862 into donut

* changes:
      * Don't clip the display if LAYOUT_NO_LIMITS is specified (as with PhoneWindowmanager does)     * FullScreen mode was not hiding status bar for app in compatibility mode       * fixed fillsScreenLw to take compatibility window into account     * Fixed the logic in needsBackgroundFiller to be consistent with other places.     * Fix NPE in WindowManagerService#applyAnimationLocked  LayoutParam can be null.