[ DevTools ] Update DevTools to 2.9.2
[ DevTools ] Update DevTools to 2.9.2

Change-Id: Id48744eeebe10eaae8b41d8235c2ad5fad3887f0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/225046
Reviewed-by: Siva Annamalai <2e618a8cbd7bb6b3d4409061ae407d692a098546@google.com>
Commit-Queue: Ben Konyi <67ffcaedcc3dc3d87dddb9627b72dd41756b31b1@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk