Turn optimize on w/ aom_qm if qmatrices are unused
Turn optimize on w/ aom_qm if qmatrices are unused

Change-Id: Ib002bb918366ba6848c983f5311aeb74ab37c1a0

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom