Fix to pass additional args from the Flutter test template (#7261)

[dkandalov]

Fix to pass additional args from the Flutter test template (#7261)

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[dkandalov]

I'm not sure why the build still shows

❌ Missing CLA from one or more contributors

Because I agreed to CLA about two weeks ago (and when I do it again it says "It looks like you've already signed this CLA").

Maybe cla/google needs rerunning?

[dkandalov]

Is anyone actively looking at the PRs here? 🤔

[dkandalov]

Opened another PR #8836