Feature/improve dogfooding settings menu

[renefloor]

🎯 Goal

Fixes FLU-104

Improve the options menu in the dogfooding app and make it more aligned to other platforms.

🛠 Implementation details

It sets the max width, so it becomes better usable on large screens.
It moves some menu items around and hides some on release builds. Those that are hidden on release are shown as 'dev options'
It adds a quick option for background filters on supported platforms.

To show the currently selected filter I added an appliedVideoEffects field in the StreamVideoEffectsManager. We might want to add a method channel so you can also fetch this from the native side instead of depending on the state in the manager. That's also why it's nullable, because before you set a filter we are not sure if a filter is set.

🎨 UI Changes

Desktop before / after:

Before	After

Mobile with and without dev options:

With	Without

🧪 Testing

On desktop you can easily test the sizing, but background filters are not supported, those should be tested on mobile.

☑️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