Merge "Cache IMountService for isUserKeyUnlocked() calls." into nyc-dev am: 36cbf5ca37
am: bda14dd987

* commit 'bda14dd987498d4c75dcbbe7b4bba73db165c1c8':
  Cache IMountService for isUserKeyUnlocked() calls.

Change-Id: Ic5577c55324a52e761919febc0cab9af0e18e919