Camera: Add facial processing features

Add smile, gaze and blink detection features

CRs-fixed: 531927
Change-Id: I7e710e6d9038b14d00d77ea87f9b4c65baa74fc0
Camera: Avoid the crash if fail to find value

If fail to find value, set index to 0,
which can Avoid camera crash.

Crs-fixed: 540594
Change-Id: Iedad101b8f065dbacac4b1203a378cad9c4bc62c
camera: Video HDR mode

 * Add option for video HDR mode.
 * Some cameras claim to support it, but spontaneously combust when
   enabled, so we'll disable it by default.

Change-Id: Ib17ff4cbb0007440ddc994889b8c2242d4d07e43
Signed-off-by: Arnav Gupta <championswimmer@aokp.co>

Conflicts:
	res/values/cm_strings.xml
	res/values/config.xml
	res/xml/video_preferences.xml
	src/com/android/camera/CameraSettings.java
	src/com/android/camera/OnScreenIndicators.java
	src/com/android/camera/VideoMenu.java

Conflicts:
	src/com/android/camera/VideoModule.java