libgralloc: Change CAMERA_HEAP to ADSP_HEAP

This changes GRALLOC_USAGE_PRIVATE_CAMERA_HEAP to
GRALLOC_USAGE_PRIVATE_ADSP_HEAP as the CAMERA_HEAP
is not used anymore

Change-Id: I5a95f68c4c7f4445ade2398dd239faad9ed16b22
2 files changed