WindowManager 全屏覆盖（包含状态栏）

layoutParams = new ();

= .MATCH_PARENT;
= .MATCH_PARENT;
= .LAST_APPLICATION_WINDOW;
= .FLAG_FULLSCREEN | .FLAG_LAYOUT_IN_SCREEN;
= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.SYSTEM_UI_FLAG_FULLSCREEN;