HDR video

* Toggles a parameter (string videoHdrParam in config.xml) on/off.

Change-Id: Iafedf74b7191ce35ab982c52f3188dc566de9d7b

Conflicts:
	res/values/cm_arrays.xml
	res/values/cm_strings.xml
	res/values/config.xml
	src/com/android/camera/CameraSettings.java
	src/com/android/camera/Util.java
	src/com/android/camera/VideoModule.java