gralloc: Mark camera and VR specific formats as BUFFER_TYPE_VIDEO.

Mark HAL_PIXEL_FROMAT_BLOB and HAL_PIXEL_FORMAT_RAW_OPAQUE as
YUV to use gralloc size calculation API.

Change-Id: I11bf40f3c4ef688d654045c99e2ebab60da55fb8
CRs-Fixed: 2226672