Remove extra android dependency

[gwen-sarapata]

This change allows Android builds to only need SwipeRefreshLayout when using DetailedList. DetailedList will not error if SwipeRefreshLayout is not installed, but will show an error to update dependencies if the widget is used without the import.

The SwipeRefreshLayout dependency was removed from the pyproject.toml on all examples files that do not use DetailedList.

This removes needing the dependency on every Android app, and can now only require the dependency when using the widget DetailedList.

This relates to the issue: Soften runtime requirement for Android SwipeRefreshLayout #2454

PR Checklist:

• All new features have been tested -> features couldn't be tested with coverage (entered # pragma: no cover), but were tested with examples to ensure app works without the dependency and will show an error to add the dependency if DetailedList is used.
• All new features have been documented -> added bullet about dependency to docs/reference/api/widgets/detailedlist.rst
• I have read the CONTRIBUTING.md file
• I will abide by the code of conduct

[freakboy3742]

Awesome - the spelling issue looks like the only thing that needs to be fixed

[freakboy3742]

Looks good - thanks for the fix!