fix: allow camera usage when microphone permission is denied on Windows

[AopBK]

Description of Change

The settings for initialising MediaCapture now differ depending on whether microphone permissions have been granted. This prevents the app from crashing due to an UnauthorizedAccessException.

Linked Issues

• Fixes [BUG] CameraView crashes on Windows if microphone permission is denied #3139

PR Checklist

• Has a linked Issue, and the Issue has been approved(bug) or Championed (feature/proposal)
• Has tests (if omitted, state reason in description)
• Has samples (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Changes adhere to coding standard
• Documentation created or updated: https://github.com/MicrosoftDocs/CommunityToolkit/pulls

Additional information

[VladislavAntonyuk]

We removed all permission checks from the library. It is now up to developers to request permission they need and when they need, with the way to use their own UI for user permissions.

[AopBK]

Thank you for the clarification.
In my PR, the CameraViewExtensions.Windows.cs only checks the permission status, but does not request or manage permissions. The actual permission requests are handled in the CameraViewPage, as expected.
@VladislavAntonyuk ,could you please advise on how to best implement this in line with the library’s current design?
For example, should I pass a parameter from the manager, or is there another approach you recommend?

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[Copilot]

Pull request overview

Adjusts Windows MediaCapture initialization for CameraView so camera usage can continue when microphone permission is denied, preventing UnauthorizedAccessException crashes (Issue #3139).

Changes:

• Build MediaCaptureInitializationSettings dynamically based on microphone permission/capability state.
• Add a camera permission status check and throw a CameraException when not granted.

[Copilot]

Permissions and PermissionStatus are used in this file, but there is no using Microsoft.Maui.ApplicationModel; (or fully-qualified references). Unless there’s a project-wide global using (none found in this project), this will not compile on Windows. Add the appropriate using or fully qualify the types.

Suggested change

	using CommunityToolkit.Maui.Core;
	using CommunityToolkit.Maui.Core;
	using Microsoft.Maui.ApplicationModel;

[Copilot]

The new CameraException message is less actionable than other platform messages (e.g., iOS includes guidance to enable permissions in settings). Consider expanding this message to tell Windows users where to enable camera access (e.g., Windows Privacy settings / app permissions), or align it with the existing wording used elsewhere in the camera implementation.

Suggested change

	throw new CameraException("Camera permission is not granted.");
	throw new CameraException("Camera permission is not granted. To enable camera access, open Windows Settings > Privacy & security > Camera and allow camera access for this app.");

[TheCodeTraveler]

Is there a better way to fix the linked issue without using Permissions.CheckStatusAsync?

CommunityToolkit.Maui.Camera (and all MAUI Toolkit libraries) now defers all permissions requests to the developers consuming our library:

https://github.com/CommunityToolkit/Maui/releases/tag/6.0.0-camera