bufferqueues: Replace usage of BnConsumerListener with IConsumerListener

In a CL in this topic, we're removing binder support for
IConsumerListener and IGraphicBufferConsumer entirely. These classes are
never sent over IPC. This also removes a redundant death listener.

Bug: 389157713
Change-Id: I504b069f0e345b963c3c03ed05ab13b71b5b186d
Flag: EXEMPT refactor
Test: builds, presubmit