feat: Expose setUseWideViewPort on Android (#106999)

[Gustl22]

The option to set whether the webview should use the wide viewport should be available.
Also the default is changed to false, because this is the expected behavior on Android devices:
https://developer.android.com/develop/ui/views/layout/webapps/targeting
On iOS also the default behavior is to NOT use wide viewport, so this is aligned.

Note: When your page is rendered in a WebView, it doesn't use wide viewport mode by default. You can enable wide viewport mode with setUseWideViewPort().

This also partically solves flutter/flutter#106999, as then the correct height is returned from document.documentElement.scrollHeight; property.

If you had to change anything in the flutter/tests repo, include a link to the migration guide as per the breaking change policy.

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki 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.
• 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.

If you need help, consider asking for advice on the #hackers-new channel on Discord.