Settings: More options added to hardware key rebinding (2/2)

Settings: Add Home/Back buttons available for rebinding (2/2)
This also removes the Kill App Longpress Back toggle in Development Settings since it is now a bindable action.

Port changes - Remove expanded desktop & notification shade support

Conflicts:

	res/values/cm_strings.xml
	res/xml/development_prefs.xml
	src/com/android/settings/DevelopmentSettings.java