Allow CDD required properties to be absent in VTS. am: 076976ee am: 4ccffdb9

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2779277



Change-Id: I6746fe30b524e904ab1f75799e0bfd8e64cb789f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>