refactor code to use RadioGroup instead of groupValue/onChanged in Radio

[AbdeMohlbi]

fixes #175355

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[Piinks]

Hey @AbdeMohlbi thanks for the contribution! Can you take a look at the failure here? It looks like it is just a matter of running the formatter to resolve. Thanks!

[AbdeMohlbi]

@Piinks i'm not sure if this is expected but it seems that the file is correctly formated according to dart format . on master maybe because it is using an old sdk version ,still i tried according to what the failure is saying and did dart pub global activate flutter_plugin_tools && dart pub global run flutter_plugin_tools format but it did not change anything so i applied the given diff not sure if this is a bug or what .

[Piinks]

LGTM thank you for fixing the formatting!

[auto-submit]

autosubmit label was removed for flutter/assets-for-api-docs/259, because The base commit of the PR is older than 7 days and can not be merged. Please merge the latest changes from the main into this branch and resubmit the PR.