Allow changing auto-brightness responsitivity.

Change-Id: Icf62db26735f9ab7ad63e750a1824eb7823c3d70

Conflicts:
	res/values/cm_arrays.xml
	res/values/cm_strings.xml
	src/com/android/settings/BrightnessPreference.java

 Author:    Danny Baumann <dannybaumann@web.de>
 Changes to be committed:
	modified:   res/layout/preference_dialog_brightness.xml
	new file:   res/values/cm_arrays.xml
	new file:   res/values/cm_strings.xml
	modified:   src/com/android/settings/BrightnessPreference.java