Merge "Upgrade grpcio-compiler to 0.12.1" into main am: 8f5c92c714 am: 09e63d434b am: fd01fb4bfa

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/grpcio-compiler/+/2664079

Change-Id: Icb7d435618ef8b8bcd49f92af2427246f311999c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>