Camera : Powerkey shutter (1/2)

Allows user to take use power key to take pictures/videos

Change-Id: I85a1e1761199f4604672be42a3a5005227f5451a

Conflicts:

	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

Conflicts:
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java