Make the lock screen camera widget configurable (1/2)

Change-Id: Ia349c39937a56ee53c2c8ec2441d71ad081572e3
(cherry picked from commit c7133ae62a5a57cf4da3c6674c1a3140ef6e7534)

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java