Add VTS for Watermark APIs am: 17a9190730

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/23303872

Change-Id: I3254aa46c59eace1ba27d8009345a7ad4e630b31
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>