Merge "Assert the errors size to 1 for case SetDisplayBrightness" into main am: 9e65f0a00d

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3174319

Change-Id: Id3d13c4a18c46e5170cfc9336ae40ec64cc6998b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>