Camera : Powerkey shutter (1/2)

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

Change-Id: I85a1e1761199f4604672be42a3a5005227f5451a
Merge "Camera : Powerkey shutter (1/2)" into kitkat
Merge "Camera : Powerkey shutter (1/2)" into kitkat

Conflicts:
	core/java/android/view/WindowManager.java
	core/res/AndroidManifest.xml