fix synchrnoized wrong object while manipulating appColdStartSubscribers

[Knight-ZXW]

No description provided.

[google-oss-bot]

Hi @Knight-ZXW. Thanks for your PR.

I'm waiting for a firebase member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[jeremyjiang-dev]

/ok-to-test

[jeremyjiang-dev]

Thanks for catching and fixing this!

[Knight-ZXW]

@jeremyjiang-dev could you merge this MR?

[jeremyjiang-dev]

/test api-information-check

[jeremyjiang-dev]

/retest

[jeremyjiang-dev]

@yifanyang Could you take a look why the api check is still in progress?

[yifanyang]

@jeremyjiang-dev

@yifanyang Could you take a look why the api check is still in progress?

We recently migrated presubmit jobs to GitHub Actions. I suppose this pull request was created during the short period where the the api job was removed from Prow, but GitHub is still expecting it. Anyway, I have merged it manually.

[jeremyjiang-dev]

@jeremyjiang-dev

@yifanyang Could you take a look why the api check is still in progress?

We recently migrated presubmit jobs to GitHub Actions. I suppose this pull request was created during the short period where the the api job was removed from Prow, but GitHub is still expecting it. Anyway, I have merged it manually.

Thank you, Yifan!