Allow CDD required properties to be absent in VTS. am: da7a4ddabd

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2779276

Change-Id: I2af62b54059e964e960689c8612994f675673893
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>