Performs the platform-native locale resolution.
Each platform may return different results.
If the platform fails to resolve a locale, then this will return null.
This method returns synchronously and is a direct call to platform specific APIs without invoking method channels.
@override Locale? computePlatformResolvedLocale(List<Locale> supportedLocales) => _platformDispatcher.computePlatformResolvedLocale(supportedLocales);