Framework: Forward port Long press back to kill app (2/2)

Change-Id: Ia88d8a2753e203afb8d6117a643c33127f991c4a

Conflicts:
	core/res/res/values/extra_strings.xml
	core/res/res/values/config.xml
	core/res/res/values/symbols.xml
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java