setKeyboardShown in willshow and willhide

[phuocantd]

Summary

resolve issue: https://github.com/react-native-community/hooks/issues/286

Test Plan

What's required for testing (prerequisites)?

What are the steps to reproduce (after prerequisites)?

Compatibility

OS	Implemented
iOS	✅
Android	✅
Web	❌

Checklist

• [X] I have tested this on a device and a simulator
• [ ] I added the documentation in README.md
• [ ] I updated the typed files (TS and Flow)
• [ ] I've created a snack to demonstrate the changes: LINK HERE

[LinusU]

This seems like quite a breaking change, and I don't think that this is what everyone wants (not that everyone wants what we currently have though 😅)

I think that the approach taken in #140 or potentially #168 is a better approach. What do you think about those?

[phuocantd]

@LinusU What do you think when adding a state willShown like shown state to know when keyboardWillShow and keyboardWillHide