Merge "Refactor how StatusBarPolicy knows if keyguard is visible." into nyc-dev
am: bbd26bc023

* commit 'bbd26bc023992ee7bc6a0e682d4a343dfe3dc848':
  Refactor how StatusBarPolicy knows if keyguard is visible.

Change-Id: I782d354549ba3185d4779a2e8b3ac6d0724e22ec