Added userInterfaceStyle prop to ActionSheetmanager to override user interface style for iOS 13

[Arjan-Zuidema]

Summary

Support to override actionsheet and share interface style to match your app. For example, when your app has it's own theming you want to match the stying on actionsheet and the share menu.

Changelog

[iOS] [Added] - Added userInterfaceStyle for ActionSheetIOS and Share to override user interface style on IOS 13

Test Plan

Set dark style

Set light style

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[cpojer]

Looks good!

[facebook-github-bot]

@cpojer is landing this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[react-native-bot]

This pull request was successfully merged by @Arjan-Zuidema in 0a9cc34.

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