am de04fb0a: Merge "Enforce serial ordering of MotionEvents." into gingerbread

Merge commit 'de04fb0a0366057028369eb3b3efcb75367f74db' into gingerbread-plus-aosp

* commit 'de04fb0a0366057028369eb3b3efcb75367f74db':
  Enforce serial ordering of MotionEvents.