Upstream release 2.0

[linliu-code]

Purpose of this PR

Proposed changes:

• <Change 1>
• <Change 2>
• <Change 3>

Change Category

• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] Feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that could affect existing functionality)
• [ ] Documentation update

Rationale

Checklist

• [ ] I have conducted a self-review of my own code.
• [ ] I have updated documentation accordingly.
• [ ] I have added tests that prove my changes are effective or that my feature works.
• [ ] Existing unit tests pass locally with my changes.

Additional Notes

[google-oss-prow[bot]]

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