camera: Add ZSL support for Samsung/Qualcomm cameras

 * Preview management for Samsung/Qualcomm cameras
 * Add workaround for broken face detection on front camera

Change-Id: Ib36bd21c9a76b45bced3eee2f25acc35b5d82b30

Conflicts:
	src/com/android/camera/PhotoModule.java
	src/com/android/camera/util/CameraUtil.java