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

* commit 'c5cb7c489bcc3a52abdd4d02fb353b0a7b8557eb':
  IGraphicBufferConsumer: fix ATTACH_BUFFER info leak