When starting a Guest user for the first time, it can take quite
awhile before the Home app enables itself. So if we're unlocked
and no other Home app is around, chill for 500ms and see if someone
showed up.
Bug: 26267450
Change-Id: I3c4e01ae3681c650ea90b20ffc21835ae264b5e9
When the home screen selected by the user isn't encryption aware, we
still need to put something on the ActivityStack. For now, let's use
an empty activity that knows how to dismiss itself when the
credential-encrypted storage is unlocked; that's enough for the
system to re-resolve the home intent and find the real home screen.
Also follow method refactoring.
Bug: 22358539
Change-Id: Iebc4ad8d2dd62ada079cab03d5765f7631fd4beb
