BufferHubQueue Cleanup

1/ Add support for NATIVE_WINDOW_CONSUMER_IS_PROTECTED
2/ Remove BufferHubQueueConsumer as we don't need it after all
3/ Merge BufferHubQueueCore into BufferHubQueueProducer
4/ Remove redundant |onAsBinder|

Bug: 38137120
Test: buffer_hub_queue-test and buffer_hub_queue_producer-test
Change-Id: I32bc040f4ce9c6dc9e4382a589fea241870eeb2d