am dd299046: Merge "frameworks/base: Implement Mutual exclusion in BroadcastReceiver"

Merge commit 'dd29904638fb36cd5585560e83367d1f5565cc4c' into gingerbread-plus-aosp

* commit 'dd29904638fb36cd5585560e83367d1f5565cc4c':
  frameworks/base: Implement Mutual exclusion in BroadcastReceiver