Refactor BufferHubBuffer to use hwbinder

Entirely move BufferHubBuffer off pdx dependency and using hwbinder
backend and rewrite test cases to fit in current behavior.

Remove duplicated test cases in buffer_hub-test. Commented out
BufferHubBuffer related parts and remove related include and using
statement.

Add hidl interface dependency to libs/gui build file to avoid compile
errors.

Test: BufferHub_test, GraphicBuffer_test, buffer_hub-test
Bug: 116681016
Change-Id: I9d8f734f681e04d3d50b7a02c27b17df8c66cbad