feat(device_info_plus): Add support for isiOSAppOnVision property in iOS device info

[OutdatedGuy]

Description

Adds the isiOSAppOnVision property for iOS platform.

Related Issues

resolves #3715

Checklist

• [x] I read the Contributor Guide and followed the process outlined there for submitting PRs.
• [x] I titled the PR using Conventional Commits.
• [x] I did not modify the CHANGELOG.md nor the plugin version in pubspec.yaml files.
• [x] All existing and new tests are passing.
• [x] The analyzer (flutter analyze) does not report any problems on my PR.

Breaking Change

Does your PR require plugin users to manually update their apps to accommodate your change?

• [ ] Yes, this is a breaking change (please indicate that with a ! in the title as explained in Conventional Commits).
• [x] No, this is not a breaking change.

[vbuberen]

Thanks for your contribution. Looks good to me, but I would like to merge this PR once there is no Beta label on this property in Apple's documentation: https://developer.apple.com/documentation/foundation/processinfo/isiosapponvision

[OutdatedGuy]

@vbuberen Looks like this property is not in beta anymore