Call close() in TearDown() am: 25cd9d67d5 am: 9fbde6a00d am: 84f98c0762

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2254818

Change-Id: I5874645dc9884e8d1fa86726cecde14acfb070ad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>