[3/3] settings: Change density on the fly

Change-Id: Ifd036c75f0423c334f8e25aaf6b3229833e779d7

Conflicts:
	res/values/config.xml
	res/values/liquid_arrays.xml
	res/values/liquid_strings.xml
	res/xml/liquid_interface_settings.xml
	src/com/android/settings/liquid/InterfaceSettings.java