Run yapf_code on v1.1.x

src/python/grpcio/grpc/_channel.py

src/python/grpcio/grpc/beta/_server_adaptations.py

src/python/grpcio/grpc/framework/foundation/logging_pool.py

src/python/grpcio_tests/tests/interop/methods.py

src/python/grpcio_tests/tests/unit/_cython/_channel_test.py