Settings : Hardware key rebinding (2/2)

Change-Id: I1a0546f358e787a9c6ab12024e34255475259424

Conflicts:
	res/values/cm_arrays.xml
	res/values/cm_strings.xml
	res/xml/button_settings.xml
	src/com/android/settings/ButtonSettings.java
[settings] long press back to kill configurable timeout (2/2)

1 - 2 seconds (default)
2 - 1,5 seconds
3 - 1 second
4 - 0,5 second

Forward ported from crDroid kk

Conflicts:
	res/values/cr_arrays.xml
	res/values/cr_strings.xml