SoundSettings: Assigning a null to an unnecessary variable

Change-Id: Ic8c3e6ff66cc888f6069e3bbef666ede3c56dc13
NFC polling mode (2/3)

Change-Id: Ic46ede10fa91f02ca73daa12aa60098c8a52ceef

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