Add a setting for Shutter Speed

Change-Id: Ieebe50a4be04e7fea9301da63c008e36f4ec0dbd

Conflicts:
	res/values/cm_arrays.xml
	res/values/cm_strings.xml
	res/values/config.xml
Util: remove redundant check for ShutterSpeed

Change-Id: I1bd8c356137225d9a4c1414ef6a07a60f7200c13
Show Actual Shutter Speedx