am c9fd186b: am 44ee0fb1: am c55edb26: Merge changes I74bfc0d5,I577f9d36 into klp-dev

* commit 'c9fd186b4692e2da63698f15be59abcd360e321c':
  Delay tearing down external displays until keyguard finishes
  Show keyguard scrim on external displays while keyguard showing