Migrate LobbyView to TrackOptions.enabled

[Nash0x7E2]

🎯 Goal

This PR addresses the issues outlined in the ticket #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

• Assigned a person/code owner group (required)
• Thread with the PR link started in a respective Slack channel (#flutter-team) (required)
• 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
• All code we touched has new or updated Documentation