Add support for multi-plane YUV HardwareBuffers

This adds a new lock method that allows locking all planes in the hardware-buffer.
To do this we also add new structs to hold this buffer information.

Documentation and testing is now in place.

Change-Id: Id4933bbdd8d47d5209a9a08e27391908df26dae1
One-Pager: https://docs.google.com/document/d/1jPlDlaAOzg6QfrX77fZ6OYwR6xeqj_xQlW81mQGigHA/edit?usp=sharing
Bug: 117617861
Test: Manual - run CTS tests