Merge "omx: validate only standard OMX roles" into sc-dev am: af592fb124 am: b08320b038 am: c6dc6fc2a1

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/15528285

Change-Id: Ib4e0a432fae25060239446dea155fb36b741e8f2