Various per-user settings such as rotation lock are relevant to the
singleton PhoneWindowManager object. We now listen for user-switch
broadcasts and reconfigure the active state based on the newly-
active user's settings.
The RotationPolicy toolset has also been updated to do the right
thing, as has the Quick Settings UI.
Bug 7213638
Change-Id: Iee2109e48df550b4c979d3f9c91b5d2b71a6a08e
5e08af03a3