Merge "Use special permission to detect tests running as "shell identity""...

Merge "Use special permission to detect tests running as "shell identity"" into udc-dev am: e7b9aaf5 am: 162fe10c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22442052



Change-Id: I623ebd2197b3b72a59fa1947a330b9f6fdc30934
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>