Revert "Camera: Powerkey shutter (2/2)"

This reverts commit 3efe00b0974074e15d40fc6b6882c7c0e161319c.

Conflicts:

	res/values/cm_strings.xml
	res/xml/camera_preferences.xml
	src/com/android/camera/CameraActivity.java
	src/com/android/camera/PhotoModule.java
	src/com/android/camera/VideoMenu.java
	src/com/android/camera/VideoModule.java