Add HardwareBuffer support to Bitmaps

This adds a new public constructor to Bitmap to allow passing in
a HardwareBuffer to back the Bitmap. Currently, the format of the
HardwareBuffer must be RGBA_8888.

One-Pager: https://docs.google.com/document/d/1n72X-gJZhjeajp4FIQwsGPKFiHBSeWYjC6fkXYe_bS0/edit?usp=sharing
Bug: 116713113
Test: manual - ran CTS tests
Change-Id: Ic437825138eafea526326e6cf300f116867ba29e