Update for Flutter 3.44

[domesticmouse]

Updates codelabs for Flutter 3.44.

Pre-launch Checklist

• I read the [Effective Dart: Style] recently, and have followed its advice.
• I signed the [CLA].
• I updated/added relevant documentation (doc comments with ///).
• All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-devrel channel on [Discord].

[gemini-code-assist]

Code Review

This pull request introduces a series of infrastructure and maintenance updates across the animated-responsive-layout, animations, brick_breaker, and colorist codelabs. Key changes include the adoption of SceneDelegate and implicit engine delegates for iOS, the addition of pre-build actions in Xcode schemes, and enhanced string conversion safety in the Windows runner. Additionally, project versions and Dart SDK constraints are updated throughout the repository. Feedback indicates that several pubspec.yaml files specify dependency versions for packages such as flutter_riverpod, riverpod_annotation, flame, and google_fonts that are not yet available in the public registry, which will result in build failures.

[parlough]

Thanks @domesticmouse! Looks good to me :)