Deprecate producer/consumer usage in BufferHub

producer_usage and consuemr_usage were introduced in Android O
temporarily then removed not long after. BufferHub added those then we
also removed them, but there appeared to be some leftovers.

Bug: 37881101
Test: buffer_hub-test, buffer_hub_queue-test, libdvr-test, libgui-test
Change-Id: I8551627bc820ddd04f6d6d7250d631fa54a78b72