devtools

0d225b22 - Use located Flutter instead of PATH flutter for Command.flutter() + support FLUTTER_ROOT override (#6669)

Use located Flutter instead of PATH flutter for Command.flutter() + support FLUTTER_ROOT override (#6669) This fixes a TODO where Command.flutter() would always run the version of Flutter from PATH and not the same one we would detect. This will allow me to fix an issue when using a custom version of DevTools in VS Code (calling "devtools_tool serve") without having to ensure my PATH points at the same version (which it probably doesn't when I'm just opening test apps that use my "normal" checkout of Flutter).