Merge "Enforce background fallback to be non-translucent" into nyc-dev am: a35724f666
am: 494529318a

* commit '494529318a0a8952ed5dc7bc00786f74f39b2612':
  Don't bother with WeakHashMap for direct alarm bookkeeping

Change-Id: I23fef9e69fb5aa0ec57d32e19d1fc513611018fd