I am not sure if it's a regression, or just a creeping number of tests, but many recent executions hit 30m and timeout. <details> <summary>Screenshot</summary>  </details> Adding `dependency: dart`, as this appears to have started happening roughly after https://github.com/flutter/flutter/pull/162498 (@srujzs).
