Merge "health VTS: Status::UNKNOWN is OK if not present" into android10-tests-dev am: 9ec8f5c603 am: f1f83f3c53

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1192280

Change-Id: I827359fc88c78f6529fb4066a32114a6be0ef10d