Merge "Improve error messages for UiTestHelper." into udc-mainline-prod am: 271dd541

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Permission/+/24483097



Change-Id: Ibde2332f999f7d2454293d294d74ec528424af1b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>