IGraphicBufferConsumer: fix ATTACH_BUFFER info leak am: dded8fdbb7 am: 7ee203b59d am: dc252255af am: 202aaa8f97 am: ec87aa5218 am: c5cb7c489b
am: e8cceaf02f

* commit 'e8cceaf02f7e15e1ef0c3446c4287ce58cc325ba':
  IGraphicBufferConsumer: fix ATTACH_BUFFER info leak