Bug report

Describe the bug
Firebase analytics logEvent allows paramters to be Map<String, Object?>?, but if object is null it throws the following error:

Fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: 'package:firebase_analytics/src/firebase_analytics.dart': Failed assertion: line 1468 pos 9: 'value is String || value is num': 'string' OR 'number' must be set as the value of the parameter: user_id. null found instead

Steps to reproduce

Steps to reproduce the behavior:

1. Add a logEvent with name and parameters
2. In parameters add a map of key and value as null

Expected behavior

If you are checking whether the value is string or num, then it shouldn't allow the object to be null right?
Paramters accept Map<String, Object>? rather than Map<String, Object?>?.

Sample project

 FirebaseAnalytics.instance.logEvent(name: "logout", parameters: {
        "user_id": user?.id,
        "user_role": user?.designation.name,
        "company_id": user?.company.id,
      });

Here there's no syntax error but breaks the flow of the app during execution

Additional context

Add any other context about the problem here.

Flutter doctor

Run flutter doctor and paste the output below:

[✓] Flutter (Channel stable, 3.16.9, on Ubuntu 22.04.3 LTS 6.5.0-15-generic, locale en_IN)
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.2)
[✓] Chrome - develop for the web
[✓] Linux toolchain - develop for Linux desktop
[✓] Android Studio (version 2023.1)
[✓] Android Studio (version 2021.2)
[✓] IntelliJ IDEA Community Edition (version 2023.1)
[✓] VS Code (version unknown)
    ✗ Unable to determine VS Code version.
[✓] Connected device (3 available)
[✓] Network resources

• No issues found!

Flutter dependencies

Run flutter pub deps -- --style=compact and paste the output below:

- firebase_analytics 10.8.3 [firebase_analytics_platform_interface firebase_analytics_web firebase_core firebase_core_platform_interface flutter]
- firebase_core 2.25.2 [firebase_core_platform_interface firebase_core_web flutter meta]