Suppress gtest error for tests without any instance am: 7f40613792 am: d55adae254 am: 41e30b93fb am: f333b41dc9

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1441023

Change-Id: Ie7d4d3171264f9d3c3c2697fd46686b5665273a6