Revert "Add support for theming the launcher."

We have another strategy which does not involve framework modifications.

This reverts commit bc77ed55.

Conflicts:

	api/current.xml
	core/res/res/values/attrs.xml
	core/res/res/values/public.xml
	core/res/res/values/styles.xml
	core/res/res/values/themes.xml

CR: Ed Carrigan