libgralloc: Query vendor specific camera format

Issue:
In the current implementation the stream format
used by camera HAL for vendor specific camera
formats is not passed to gralloc and it is pre
decided. This can lead to format mismatch if
display and camera code is not from the same
branch.

Fix:
Query vendor specific camera format from camera
HAL if the functionality is available.

Change-Id: Ice6d3dd0dc436d02cbeaec52ee5701a6cdead1cb
2 files changed