[Bug]: CI allows merging PRs with failing checks

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Is there a StackOverflow question about this issue?

- [X] I have searched StackOverflow

### What happened?

#### Initial push, all checks are run:


#### Because commit contains UI changes, an automated commit `🤖 Updates screenshots` is added, resetting all checks but `cla/google`


#### Resulting in `✅ All checks have passed`

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For reference, this is what happened in #942 [breaking the main branch after merge](https://github.com/android/nowinandroid/issues/1041).
And #1044 for a simpler example.

### Relevant logcat output

_No response_

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct

Compare the check results in the screenshots before and after the automated “🤖 Updates screenshots” commit, using #942/#1041 and #1044 as related examples. Trace the CI configuration that handles these commits and verify that stale or missing checks cannot produce a passing merge result; done when a failing check still blocks merging.

Written by the indexing model from the issue text.