fix: Support Map-based listeners in AnimatedPoint (RN 0.83+ compatibility)

[sleda]

Description

Fixes crash on React Native 0.83+ related to AnimatedPoint.

In React Native 0.83, the underlying Animated nodes (inherited via AnimatedWithChildren) changed the internal _listeners storage from a plain Object to a Map.

The AnimatedPoint class was unconditionally overwriting this._listeners = {} in its constructor and accessing it using object notation (this._listeners[id]), which caused crashes on newer React Native versions when using AnimatedPoint or ShapeSource with animated coordinates.

Changes:

• Constructor: Updated to preserve this._listeners if it has already been initialized (e.g., as a Map by the superclass in RN 0.83+). It falls back to {} only if uninitialized (RN < 0.83).
• addListener / removeListener: Added logic to detect if _listeners is a Map or an Object and use the appropriate methods (.set()/.delete() vs object assignment).

Test Plan

I have successfully tested this fix on React Native 0.83.0-rc.5 with New Architecture (Fabric) enabled on iOS 26.2. The crash is resolved, and animated location updates work as expected.

Reproduction / Validation Steps

I utilized the following minimal reproduction component to isolate the issue:

import { AnimatedPoint } from '@rnmapbox/maps';
import { useEffect } from 'react';

// This component isolates the AnimatedPoint logic to verify listener attachment
export function TestCrash() {
  useEffect(() => {
    console.log('Testing AnimatedPoint listener...');
    try {
      const point = new AnimatedPoint({
        type: 'Point',
        coordinates: [0, 0],
      });
      
      // CRITICAL: This line triggers the crash on RN 0.83+ without this fix
      const id = point.addListener(() => {
        console.log('Point changed');
      });
      
      console.log('AnimatedPoint listener added successfully, ID:', id);
      point.removeListener(id);
    } catch (e) {
      console.error('AnimatedPoint crash test failed:', e);
    }
  }, []);
  return null;
}

Results:

• Before Fix: App crashes immediately upon mounting TestCrash or using .
• After Fix: Logs confirm success:

LOG Testing AnimatedPoint listener... LOG AnimatedPoint listener added successfully, ID: 1-1765381572236

And works smoothly.

Checklist

• I've read CONTRIBUTING.md
• I updated the doc/other generated code with running yarn generate in the root folder
• I have tested the new feature on /example app.
• In V10 mode (Validated logic against known crash)
• In New Architecture mode/ios
• In V10 mode/android
• In New Architecture mode/android
• I added/updated a sample - if a new feature was implemented (/example)