mm-video: update metadata-type used for HAL1 based recording.

-Update metadata buffer type from kMetadataBufferTypeCameraSource to
 kMetadataBufferTypeNativeHandleSource.
-Surface recording uses a different metadata as compared to
 legacy camera metadata (HAL1). Cast the gralloc-meta to
 appropriate struct to extract the handle.

CRs-Fixed: 1026926

Change-Id: Iae638c461d369a81fb8587d612ba26d525dc7953
1 file changed