[automerger skipped] [RESTRICT AUTOMERGE]: Add STS annotations to EphemeralTest am: eb2a747916 am: dfc29fa297 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/12786847

Change-Id: I9b56ca3b0e142c293f06b78eeb6f3aa73203d679