kill app long press back

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

Change-Id: Ieb749482c432a8ad72abb98c574923fdd573603c

Conflicts:
	core/res/res/values/simpleaosp_strings.xml
	core/res/res/values/symbols.xml