Merge "Upgrade grpcio-compiler to 0.12.1" into main am: 8f5c92c714 am: bbc53266b1

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

Change-Id: I8a10957f39b40058af170b09737095be34390159
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>