Fixing gantry failures by ignoring tests. am: b338624b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/DocumentsUI/+/26170879



Change-Id: Ie981c127719b4455880e426693df633161e211bc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>