[automerger skipped] DO NOT MERGE ANYWHERE Require protobuf for build flags am: b324a11a -s ours am: de762a00 -s ours

am skip reason: contains skip directive

Original change: https://android-review.googlesource.com/c/platform/build/+/3107022



Change-Id: I6e12180e8551693572656c4ee3f5f7bfa58cd100
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>