[flutter_adaptive_scaffold] Map NavigationsRails destinations and use group and labelType

[martijn00]

List which issues are fixed by this PR. You must list at least one issue.

flutter/flutter#141060
flutter/flutter#115235

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene page, which explains my responsibilities.
• I read and followed the relevant style guides and ran the auto-formatter. (Unlike the flutter/flutter repo, the flutter/packages repo does use dart format.)
• I signed the CLA.
• The title of the PR starts with the name of the package surrounded by square brackets, e.g. [shared_preferences]
• I linked to at least one issue that this PR fixes in the description above.
• I updated pubspec.yaml with an appropriate new version according to the pub versioning philosophy, or this PR is exempt from version changes.
• I updated CHANGELOG.md to add a description of the change, following repository CHANGELOG style, or this PR is exempt from CHANGELOG changes.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is test-exempt.
• All existing and new tests are passing.

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[flutter-dashboard]

It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact "@test-exemption-reviewer" in the #hackers channel in Chat (don't just cc them here, they won't see it! Use Discord!).

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.

[gspencergoog]

[martijn00]

@Renzo-Olivares @gspencergoog Done

[Renzo-Olivares]

LGTM, thank you for the contribution and the quick changes!

[gspencergoog]

Looks like there are some changes needed to the CHANGELOG:

 ERROR: Package validation found the following potential issue:
 * /b/s/w/ir/x/w/packages/packages/flutter_adaptive_scaffold/CHANGELOG.md doesn't mention current version (0.1.11+2).
   Consider updating it with notes on this version prior to publication.
 Package validation found the following hint:
 * The previous version is 0.1.11+1.
   
   It seems you are not publishing an incremental update.
   
 ERROR:   Consider one of:
   * 1.0.0 for a first major release.
   * 0.2.0 for a breaking release.
   * 0.1.12 for a minor release.

[auto-submit]

auto label is removed for flutter/packages/7310, due to - The status or check suite Linux repo_checks has failed. Please fix the issues identified (or deflake) before re-applying this label.

[martijn00]

@gspencergoog changelog and version are done now.