StatusBarUtils Bug

[hwisprianz]

If need set statusBar background and foreground at same time. It seems that must set background before set foregound. if didn't do this. Set background always override foregbackground to light-model.
I find code in you lib like this :

wondow.setFlags([flag]);

maybe you need save foreground mode flag before set backgroud flag ,then set foreground mode flag to final flag ,like this :

` int flag = View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            int foreDark = activity.getWindow().getDecorView().getSystemUiVisibility() & View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
            //can't set 0
            flag |= foreDark;
        }
        activity.getWindow()
                .getDecorView()
                .setSystemUiVisibility(flag);