Peek wake timeout (1/2)

- Allow user to set how long peek notification will hold screen on

- This is totally based on @LorDClockaN with very little adjustments. A big thanks to him for this
Original commit: https://github.com/AICP/frameworks_base/commit/90b47fc55ec59520d6dd5dd828ff48a3a3dca1d4

Change-Id: I3a3c7e6f99edd9c861566b2d738d31e7657a0322

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationPeek.java