[automerger skipped] [automerge] Revert "Revert "RESTRICT AUTOMERGE Set BUILD_ID=SC"" 2p: ef1bcc1f9a am: 6fd648e189 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/15798253

Change-Id: I949b94b0946ed3e02d02528e5d07acdd08b1273a