[rk3399][Android 6.0]隐藏状态栏

framework/base/packages/SystemUI/src/android/systemui/statusbar/phone/
PhoneStatusBar.java
修改：
makeStatusBarView(){
...........
...........
mStatusBarView=
(PhoneStatusBarView)mStatusBarWindow.findViewById(R.id.status_bar) ;
//add by luotao start
mStatusBarView.setVisibility(View.GONE) ;
//end
}
目的：隐藏状态栏，在Launcher界面下滑不显示状态来