Merge "Upgrade rust/crates/protobuf-codegen to 2.18.0" am: b3bcffa192 am: 1d6226ac6f am: 18d29baeac am: 4bdbf20433

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/protobuf-codegen/+/1451283

Change-Id: I1044d349dc58886b6aec15f12816b8fbb6c150d7