Fix some map events not propagating to flutter side due to excessive re-subscribtions (#805)

Author: evil159

lib/src/map_events.dart

@@ -16,7 +16,7 @@ final class _MapEvents {
   OnStyleImageUnusedListener? _onStyleImageUnusedListener;
   OnResourceRequestListener? _onResourceRequestListener;
   late final MethodChannel _channel;
-  List<_MapEvent> _subscribedEventTypes = [];
+  List<_MapEvent> subscribedEventTypes = [];
 
   List<_MapEvent> get eventTypes {
     final listenersMap = {
@@ -54,15 +54,15 @@ final class _MapEvents {
   void updateSubscriptions() {
     final newEventTypes = eventTypes;
 
-    if (listEquals(newEventTypes, _subscribedEventTypes)) {
+    if (listEquals(newEventTypes, subscribedEventTypes)) {
       return;
     }
 
     // let the native side know which events we are interested in
     _channel.invokeMethod(
         "subscribeToEvents", newEventTypes.map((e) => e.index).toList());
 
-    _subscribedEventTypes = newEventTypes;
+    subscribedEventTypes = newEventTypes;
   }
 
   void dispose() {

lib/src/map_widget.dart

@@ -206,6 +206,7 @@ class _MapWidgetState extends State<MapWidget> {
       'mapboxPluginVersion': '2.5.0-rc.1',
       'eventTypes': _events.eventTypes.map((e) => e.index).toList(),
     };
+    _events.subscribedEventTypes = _events.eventTypes;
 
     return _mapboxMapsPlatform.buildView(widget.androidHostingMode,
         creationParams, onPlatformViewCreated, widget.gestureRecognizers,