my/py failures on streaming_pull_manager

[acocuzzo]

Steps to reproduce

nox > python -m pip install -e '.[all]'
nox > python -m pip install mypy==0.910
nox > python -m pip install types-protobuf types-setuptools
nox > python -m pip install 'google-api-core[grpc]>=2.1.1' 'google-cloud-core>=2.2.0'
nox > mypy google/cloud

Stack trace

google/cloud/pubsub_v1/subscriber/_protocol/streaming_pull_manager.py:178: error: _ScalarV? has no attribute "startswith"
google/cloud/pubsub_v1/subscriber/_protocol/streaming_pull_manager.py:186: error: _ScalarV? has no attribute "future"
google/cloud/pubsub_v1/subscriber/_protocol/streaming_pull_manager.py:203: error: _ScalarV? has no attribute "future"
google/cloud/pubsub_v1/subscriber/_protocol/streaming_pull_manager.py:207: error: _ScalarV? has no attribute "future"
google/cloud/pubsub_v1/subscriber/_protocol/streaming_pull_manager.py:208: error: _ScalarV? has no attribute "future"