Check themes of current user, not user 0.
LayerActivity: Corrected lifecycle
Should contemplate the case that the activity gets stopped
Show as floating window on recent apps

This also removes "hybrid properties" from recents menu, it is fairly unneeded
now. This is a test, It's probable that it will be removed later

Change-Id: I3db3a996fa08367e3dfa4231079fe5e811e3b08a