What version of gRPC and what language are you using?

grpcio-health-checking==1.49.0rc1

What operating system (Linux, Windows,...) and version?

Ubuntu 20.04.2 LTS

What runtime / compiler are you using (e.g. python version or version of gcc)

Python 3.8.10

What did you do?

pip install protobuf==3.19.1 grpcio-health-checking==1.49.0rc1
python -c 'from grpc_health.v1 import health_pb2, health_pb2_grpc'

What did you expect to see?

no import error or dependency resolution conflict

What did you see instead?

ImportError: cannot import name 'builder' from 'google.protobuf.internal'

Anything else we should know about your project / environment?

I think it makes sense to increase minimum protobuf version for grpcio-health-checking before releasing 1.49.0 or fix incompatibility:
https://github.com/grpc/grpc/blob/master/src/python/grpcio_health_checking/setup.py#L65