NotificationLight: Fix forced close on non voice capable devices

Change-Id: Ib2c1e7d22414cff3ce06936a75d9de342b32320f
Fix button brightness preview.

Change-Id: I2b0933062d443855114088e1bb4c09c68a83a0e5
Merge "NotificationLight: Fix forced close on non voice capable devices" into cm-10.2
App sidebar [2/2]

Change-Id: Ie33d0968de683d340177793d6aa3d47d39437b6b
merge changes from CyanogenMod 10.2 into local branch
Fix Derps

Change-Id: I7ff0d7bb4f9c912091acc0686f302bd75c94885b