fix: `shorebird init` will fail if gradle invocations require arguments

[eseidel]

My understanding is that sometimes customers have gradle set up so that app:tasks might require arguments to exit cleanly?

https://discord.com/channels/1030243211995791380/1318421477544169472/1318421477544169472

https://github.com/shorebirdtech/shorebird/blob/19ef47b6b18516f13851f8487b45e795732c9c21/packages/shorebird_cli/lib/src/executables/gradlew.dart#L144