systemUI: fix notification dissapearing during recreation and possible

app crashes due that binded notifications are not there anymore

as well small cleanup

Change-Id: Ieed143088a55693fc56e6526e6b349d72b7b25cc
Forward port CM Screen Security settings (1/2)
* Lockscreen Vibrate
* Slide Lock Delay
* Menu Unlock
* Home Unlock

Forward port from cm-10.2, adjusted for 4.4

Amended for use in temasek build