[automerger skipped] Merge "Support Skia's gray SkColorSpaces" into rvc-dev am: b86e5a77a1 am: 3ba5059761 am: 8be9a29753 am: be24443d92 -s ours

am skip reason: Change-Id I94fe232e10f56a69832d4a39a2e5909eac641264 with SHA-1 d82d585f28 is in history

Change-Id: I1426e3a60053615f0e958b089779060c2354728c