Merge "UsecaseValidator: ignore special use cases when usage is unknown" into udc-dev am: c51730bb am: 3f6c493c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/23348706



Change-Id: Ib6141bb7792acaf7d910606e12ea250768fd1dd9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>