make sure BufferQueue releases newly acquired buffers on failures

this prevents SurfaceTexture producer to hang in dequeueBuffer()
when something goes wrong in the consumer.
only the consumer gets an error and the current frame is kept
instead of the new one. the producer is unaware of the problem.

Bug: 6476587
Change-Id: Ie6db5526632aabc3e60229b93dfe29c19491ade4