Active Notifications:

combine lockscreen notifications and active display
into one feature and add improvements/fixes.

David96 -> the original lockscreen notifications
clark scheff -> the active display source

PS2:  make removeView in Active Display mode respect privacy option
PS3:  clean up some sensor stuff - reduce IO for quiet hours
PS4:  modify layouts FTW
PS5:  fix screen shutting off after timeout when in regular use
PS6:  fix a ton of inherent bugs with proximity sensor, handler,
      and center drawable
PS7:  add excluded apps to lockscreen notifications
PS8:  fix string for secure lockscreen showing unless text is set &&
      keyguard secure.  also set icon == 0 an invalid notification target

Change-Id: Iac4ba705d7bfd501f595dcda1e663caf2a066ef0

more fixes for active display

fix pocket mode not turning the screen on
fix the top notification preview not changing when notifications are dismissed

Change-Id: I78d9627012b18d867696457f5a0511c5752e8523