gralloc: Add option for YCrCb venus camera preview

On judypn (LG V40) camera preview has red/blue colors
switched with HAL_PIXEL_FORMAT_YCbCr_420_SP_VENUS but
HAL_PIXEL_FORMAT_YCrCb_420_SP breaks camera preview
entirely.

When using HAL_PIXEL_FORMAT_YCrCb_420_SP_VENUS camera
preview works fine, with correct colors.

Change-Id: I84ffcbbeb66acf4401294de6b4f3cf846c7530b9
2 files changed