Allow users to set default browser configuration

[kenzieschmoll]

I'm not sure this is feasible yet, but transferring a user request over from #492. User's would like to be able to launch DevTools in their default browser.

[dmcrider]

With the release of Flutter 2 last month, is it now more feasible to launch DevTools in a browser of our choosing? I installed Flutter for the first time today and it's still complaining that I don't have Chrome installed

EDIT: DevTools actually opened in Brave (my default browser) without any configuration on my part.

[plato79]

My default browser is brave but Chrome is also installed. It opens Chrome when it founds it.

[knotbin]

I hope this can be revisited soon. Being browser agnostic is very important, as many developers use non-Chrome browsers.