Merge "Use abstractions to allow FullscreenUserSwitcher take advantage of...
Merge "Use abstractions to allow FullscreenUserSwitcher take advantage of SystemUIOverlayWindow." into rvc-dev am: 995e2de8 am: 8d131e35
Change-Id: Icc45b22caa83be18308242aae56d9ad5f0384b59