Add ability to change ringer mode from the lockscreen (part 2)

Settings app part of lockscreen target which is able to change ringer mode between
silent/vibration and normal

Framework part required: I8e95379ace8d20741fae3e298d742db7e77643d1

Change-Id: Icae1298e7a9d2847d1ec185cf160ba495bd45dba

Conflicts:

	res/values/cm_strings.xml
	src/com/android/settings/chameleonos/LockscreenTargets.java