[flutter_tools] add more debugging when pub get fails by @christopherfujino in https://github.com/flutter/flutter/pull/108062

Remove outdated Fuchsia concepts by @richkadel in https://github.com/flutter/flutter/pull/107335

[flutter_tools] Remove unused parameter when connecting DAP to VM Service by @DanTup in https://github.com/flutter/flutter/pull/108285

[iOS] Update template icons by @RockerFlower in https://github.com/flutter/flutter/pull/107873

Upgrade Gradle and AGP versions to 7.5/7.2 and migrate examples/tests by @GaryQian in https://github.com/flutter/flutter/pull/108197