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

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



Change-Id: I3712e56bdb4d9b982f2c1096b15bb8c958af148b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>