feat: added sensitivity controller to android

[adamsythe]

Summary

This pull request allows users to toggle the sensitivity on android. It is particularly useful for pagerview's that contain scrollable webviews.

Test Plan

Make sure the prop filters through the JS to reduceDragSensitivity kotlin function and is set correctly. Make sure the app visibly scrolls with less sensitivity as the number increasers.

What's required for testing (prerequisites)?

Just be able to run the app in android studio

What are the steps to reproduce (after prerequisites)?

Go to BasicPagerViewExample and add the prop
ScrollSensitivity={8}
in Android studio put a stop on
android/src/main/java/com/reactnativepagerview/PagerViewViewManagerImpl.kt on line 25.

Run the basic example and when the stop fires check that the prop is correctly set at 8.

You can also toggle the number and notice the reduced sensitivity on higher numbers.

Compatibility

OS	Implemented
iOS	✅❌
Android	✅

Checklist

• 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)

[troZee]

Hello 👋
Thank you for your 1st contribution ❤️ Could you tell, if your problem is described in this article https://bladecoder.medium.com/fixing-recyclerview-nested-scrolling-in-opposite-direction-f587be5c1a04 ?