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

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

Change-Id: I3ee1772cc2a74ee3b3c23fdc268731a46af40368