Merge "Ignore failing test case in FileCopyUiTest and flaky test in CancelFromNotificationUiTest." into rvc-dev am: 15420741 am: 924d4f17 am: 188c7294 am: 1ad5463f am: face6479

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/DocumentsUI/+/12092943

Change-Id: Id3ad0a33c39f11c98d2350a617eada9510d2a1ed