Add new themes items to personalization menu

Bring in logic for the new chooser. If TMO chooser is installed it will get
first priority.

Change-Id: Ia8e852e5e5ad2465d0b9b73f16c7080a7337bb8a

Conflicts:

	res/values/slim_strings.xml
	res/xml/settings_headers.xml
Fixes for the last commits

Change-Id: I0f373158157b56542cdb6ada73383ab1770d29e8