chore(ios): Silence/fix warnings

[jcesarmobile]

Platforms affected

iOS

Motivation and Context

silences and fixes warnings in code

closes https://github.com/apache/cordova-plugin-statusbar/issues/215

Description

silences deprecation warnings since the code still works (tested on iOS 15) and is only used if UIViewControllerBasedStatusBarAppearance is present in the Info.plist and with NO value.

Testing

real device and simulator

Checklist

• [x] I've run the tests to see all new and existing tests pass
• [ ] I added automated test coverage as appropriate for this change
• [x] Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• [x] If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• [ ] I've updated the documentation if necessary