TRDS 3.0 & new theme engine preparation [4/5]

Change-Id: I1fbb63d5e39cd736700a273bcb4cb6f0c62affbb

Conflicts:
	res/values/custom_arrays.xml
	res/values/custom_strings.xml
	res/xml/settings_headers.xml
	res/xml/theme_settings.xml
	src/com/android/settings/Settings.java
	src/com/android/settings/TRDSEnabler.java