As part of #152194, we discussed there are several sources of duplicated code in the Flutter SDK internals, particularly around things like "working with ADB", "parsing Gradle logs", "understanding exit codes", and "comparing golden files".

One suggestion was the creation of a flutter/flutter/packages/_flutter_common (the actual name should be better if able).

It's not clear what the scope of this package would be, how we would maintain it, who would be responsible for it, and how to stop it devolving from a utils folder, but it's an idea on how to reduce some code duplication. This issue is tracking ideas or suggestions towards that end, and I'll revisit it at the end of Q3 to see if there is a viable path.

/cc @christopherfujino @jonahwilliams @andrewkolos @johnmccutchan @gaaclarke @jmagman @Piinks