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

PowerManager : Make proximity check opt-in

Change-Id: I7cf64a82530da2e655018e43683ba7a5584d54f8

Framework : Fix proximity wakeup reference

Conflicts:
	core/res/res/values/config.xml

Change-Id: Ia40ca6fbf6e37fbb3996f2384f725c30b88c2131