Revert "QuickSettings: add holo dark/light theme chooser (2/2) - WIP"

This reverts commit 62a7d98c982f10d7f6cb234d3701169ec6336ad5.
RC: Toggle rewrite (2/2)

PS2: Rebase

Change-Id: Idb9c658ae8a9682812c60f94088e5209bb120d61