multiwindow: light/dark theming, flags

Change-Id: Ib9650996aaec69d78d854cb5f1de02ec00fcf78c
multiwindow: mms doesnot jump home, facebook ends on tap-outside

Change-Id: Icb161f26f751b2e366e29c94e29fcd3b1868586c
multiwindow: multiwindow minds activity/stack life cycle

Change-Id: I43efd5df5e43ec677421e488f178129ab975050e