Fix issue Mapbox used after being disposed

[mayananand369]

I have a logout button in my app. After logging out, an exception is being thrown which says: A MapboxMap was used after being disposed. Once you have called dispose() on a MapboxMap, it can no longer be used.

Below are the relevant codes:

 void _showLogoutConfirmationDialogUsing(
    BuildContext context,
  ) =>
      ActionDialog.show(
        context,
        content: context.localize.areYouSureYouWantToLogout,
        onActionDismissed: () {
          Navigator.of(
            context,
          ).pop();
        },
        onActionConfirmed: () {
          Navigator.of(
            context,
          ).pop();

          context.read<Web3AuthLogoutBloc>().add(
                const Web3AuthLogoutEvent.logout(),
              );
        },
      );

 @override
  void dispose() {
    _mapboxMap?.dispose();
    _clickedRestriction.dispose();
    _centerLocationNotifier.dispose();
    _mapStyleNotifier.dispose();

    super.dispose();
  }

https://github.com/user-attachments/assets/b79c8405-ffd2-4216-a27f-681de923c213

[evil159]

@mayananand369 could you put a breakpoint in MapboxMap.dispose(), is it called twice by any chance?