keyboard: adding functional alt/shift lights

This is useful for devices that has QWERTY keyboard
and leds for the Alt/Shift (Fn/Caps) keys, like
htc doubleshot.

Depends on libhardware patch for the light ids:
http://review.cyanogenmod.org/34902

Change-Id: I66ebc2d881438f5b51db77eaa885421e65a7da0d
ProximityWake : Add support for checking proximity when waking device

Change-Id: Ia5ff446d88435773acccc7467e66009000dc20cb
Be sure to shutdown the proximity sensor after display wake

This fixes:
http://review.cyanogenmod.org/#/c/66657/

Change-Id: I1768f13cb48c3e056d0e137642690fc3d650c4ab
Proximity : Check proximity flags only if from native

Change-Id: Id1be619e638de6a45252d8390eab6e38bd5de5a7
PowerManager : Make proximity check opt-in

Change-Id: I7cf64a82530da2e655018e43683ba7a5584d54f8