Add a Wrap with ValueListenableBuilder quick assist

[kenzieschmoll]

[dart-github-bot]

Summary: Request to add a quick assist in Dart's IDE to automatically wrap code with ValueListenableBuilder.

[FMorschel]

If nobody is already doing it, I volunteer to fix this.

Edit: related to flutter/flutter-intellij#4540

[kenzieschmoll]

I have a fix up for review already (https://dart-review.googlesource.com/c/sdk/+/408401) Thanks though @FMorschel!