Settings: remove preference if device hasn't LockClock installed

Change-Id: I8b43501af12a3f4eba3a4ee87dbd416662639886
Merge "Settings: remove preference if device hasn't LockClock installed" into cm-11.0
NFC polling mode (2/3)

Change-Id: Ic46ede10fa91f02ca73daa12aa60098c8a52ceef

Conflicts:
	res/values/arrays.xml
	res/values/strings.xml
	src/com/android/settings/WirelessSettings.java