XHaloFloatingWindow：实现APP窗口化分屏.
官方介绍
XHaloFloatingWindow是一款桌面漂浮空间，自定义后可以在桌面快速的开启应用。需要Xposed框架支持。
更新日志
Add new gravity chooser
Add base code for First Use Screen (not ready yet)
Change Main Preference to a sliding navigation
Change ActioNBAr to dark + Replace action bar icons with white ones
Made popup alpha and popup dim preference live update
Code Refactoring:
--> Optimized Movable Window hooks
--> Fix mistake in blacklist and whitelist
--> Revert "Simplify hook for the Testing Area."