copybit: Add support for HAL_PIXEL_FORMAT_YCbCr_420_SP_VENUS format.

Currently framework is not returning the correct MDP format
corresponding to HAL_PIXEL_FORMAT_YCbCr_420_SP_VENUS format.
Modifying the right format to be returned.

Change-Id: I1862dea6daf6cc90e25492af7bf2e7f3bf6328ec
1 file changed