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This change requires https://github.com/flutter/buildroot/pull/811, and can be executed from buildroot by ``` python3 flutter/tools/fuchsia/with_envs.py flutter/testing/fuchsia/run_tests.py ``` Bug: https://github.com/flutter/flutter/issues/140179 - [V] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [V] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [V] I read and followed the [Flutter Style Guide] and the [C++, Objective-C, Java style guides]. - [V] I listed at least one issue that this PR fixes in the description above. - [V] I added new tests to check the change I am making or feature I am adding, or the PR is [test-exempt]. See [testing the engine] for instructions on writing and running engine tests. - [V] I updated/added relevant documentation (doc comments with `///`). - [V] I signed the [CLA]. - [V] All existing and new tests are passing. [C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style