Fix Quick Settings USB Tether tile (1 of 2)

Patch Set 4: Make tile dynamic

Change-Id: I43fec8c3264b89b647f1626b8d29e459e78672ab

Conflicts:
	res/values/strings.xml
	res/xml/quick_settings_panel_settings.xml
	src/com/android/settings/liquid/QuickSettings.java