Translate: Declare encoding as utf-8 in pb2 files (via synth).

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/translate/synth.py. synthtool > Ensuring dependencies. synthtool > Pulling artman image. latest: Pulling from googleapis/artman Digest: sha256:6db0735b0d3beec5b887153a2a7c7411fc7bb53f73f6f389a822096bd14a3a15 Status: Image is up to date for googleapis/artman:latest synthtool > Cloning googleapis. synthtool > Running generator for google/cloud/translate/artman_translate_v3beta1.yaml. synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/translate-v3beta1. synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/translate/v3beta1/translation_service.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/translate-v3beta1/google/cloud/translate_v3beta1/proto/translation_service.proto synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/translate-v3beta1/google/cloud/translate_v3beta1/proto. synthtool > Replaced 'google.cloud.translation_v3beta1.proto' in google/cloud/translate_v3beta1/proto/translation_service_pb2_grpc.py. synthtool > Replaced "record delimiters are ':raw-latex:`\\\\n`' instead of\n ':raw-latex:`\\\\r`:raw-latex:`\\\\n`'." in google/cloud/translate_v3beta1/proto/translation_service_pb2.py. synthtool > Replaced '__doc__ = """Attributes:' in google/cloud/translate_v3beta1/proto/translation_service_pb2.py. synthtool > Replaced 'This field has the same length as \\[``contents`\n\\s+`\\]\\[google\\.cloud\\.translation\\.v3beta1\\.TranslateTextRequest\\.conte\n\\s+nts\\]\\.' in google/cloud/translate_v3beta1/proto/translation_service_pb2.py. .coveragerc .flake8 MANIFEST.in noxfile.py.j2 setup.cfg Running session blacken Creating virtualenv using python3.6 in .nox/blacken pip install black black docs google tests noxfile.py setup.py reformatted /tmpfs/src/git/autosynth/working_repo/translate/google/cloud/translate_v3beta1/__init__.py reformatted /tmpfs/src/git/autosynth/working_repo/translate/google/cloud/translate_v3beta1/gapic/translation_service_client_config.py reformatted /tmpfs/src/git/autosynth/working_repo/translate/google/cloud/translate_v3beta1/gapic/transports/translation_service_grpc_transport.py reformatted /tmpfs/src/git/autosynth/working_repo/translate/google/cloud/translate_v3beta1/types.py reformatted /tmpfs/src/git/autosynth/working_repo/translate/noxfile.py reformatted /tmpfs/src/git/autosynth/working_repo/translate/google/cloud/translate_v3beta1/proto/translation_service_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/translate/google/cloud/translate_v3beta1/gapic/translation_service_client.py reformatted /tmpfs/src/git/autosynth/working_repo/translate/tests/unit/gapic/v3beta1/test_translation_service_client_v3beta1.py reformatted /tmpfs/src/git/autosynth/working_repo/translate/google/cloud/translate_v3beta1/proto/translation_service_pb2.py All done! ✨ 🍰 ✨ 9 files reformatted, 16 files left unchanged. Session blacken was successful. synthtool > Cleaned up 3 temporary directories. synthtool > Wrote metadata to synth.metadata.