Contains configuration and tools related to Flutter's build infrastructure.
Configuration is generated by lucicfg, which is part of depot_tools. Rather
than updating the individual .cfg files, updates should be made to
config/main.star. That file can then be run to regenerate the configuration.
One may speed up the propagation of these configuration files by visiting the luci-config web UI, logging in, and searching for projects/flutter. From there, one may click on the projects/flutter search result and click the download icon to force an update.