fix(android): use composition for JSPointerDispatcherCompat (#1477)

## 📜 Description

JSPointerDispatcher became a final Kotlin class in React Native 0.87+
(after the Java-to-Kotlin migration in
https://github.com/facebook/react-native/pull/56910), so
JSPointerDispatcherCompat can no longer extend it.

While I'm restoring it in:
- https://github.com/facebook/react-native/pull/57022

Ideally we would want to reduce the API surface of RN apis. 

So here I'm switching from inheritance to composition by holding an
internal
JSPointerDispatcher delegate and forwarding calls to it.

## 🤔 How Has This Been Tested?

Looking for guidance on how to test this.

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## 📸 Screenshots (if appropriate):

N/A

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## 📝 Checklist

- [ ] CI successfully passed
- [ ] I added new mocks and corresponding unit-tests if library API was
changed