Migrate LobbyView to `TrackOptions.enabled`

🎯 Goal

This PR addresses the issues outlined in the ticket https://github.com/GetStream/stream-video-flutter/issues/617.

🛠 Implementation details

Migrates the StreamLobbyView view implementation to TrackOptions.enabled instead of TrackOptions.provided. The Camera and Microphone on/off state are checked and synced to a new instance of CallConnectOptions before being passed to the active Call object.

Tested on:

Android: Pixel 3a API version 32
iOS: iPhone 15 Pro Max, iOS 17.4
React: Stream's current production demo app

🧪 Testing

To be added in a separate PR (testing infra needs to be configured)

☑️Contributor Checklist

General

[x] Assigned a person/code owner group (required)
[X] Thread with the PR link started in a respective Slack channel (#flutter-team) (required)
[X] PR is linked to the GitHub issue it resolves

☑️Reviewer Checklist

[ ] Sample runs & works
[ ] UI Changes correct (before & after images)
[ ] Bugs validated (bugfixes)
[ ] New feature tested and works
[X] All code we touched has new or updated Documentation

GetStream / stream-video-flutter