Add resource to disable the CM Phone IME selector method (2/2)

The CM IME selector is enabled along side the Android version on tablet devices,
creating duplicate IME selectors. This gives an easy option to disable the CM
IME selector as a resource value for tablet or similar devices.

Thanks to Mike Kasick for the much needed help. :)

Change-Id: I18b60209933350fb624f20307077664ac026bfea

Conflicts:
	core/res/res/values/config.xml
	core/res/res/values/public.xml
	services/java/com/android/server/InputMethodManagerService.java