Migrate to cargo_embargo. am: f78d645463 am: 8213bb4ca5 Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/grpcio-compiler/+/2832422 Change-Id: I3c89b1090be9a25a1bb37a652043a896c67a78a6 Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>