Fix camera view regression (#2951)

Author: zhitaop

src/CommunityToolkit.Maui.Camera/CameraManager.macios.cs

@@ -106,12 +106,7 @@ public partial void UpdateZoom(float zoomLevel)
 
 	public partial ValueTask UpdateCaptureResolution(Size resolution, CancellationToken token)
 	{
-		if (cameraView.SelectedCamera is null)
-		{
-			throw new CameraException($"Unable to update Capture Resolution because {nameof(ICameraView)}.{nameof(ICameraView.SelectedCamera)} is null.");
-		}
-
-		if (captureDevice is null)
+		if (cameraView.SelectedCamera is null || captureDevice is null)
 		{
 			return ValueTask.CompletedTask;
 		}

src/CommunityToolkit.Maui.Camera/CameraManager.windows.cs

@@ -157,16 +157,11 @@ private partial void PlatformStopCameraPreview()
 
 	async Task PlatformUpdateResolution(Size resolution, CancellationToken token)
 	{
-		if (!IsInitialized || mediaCapture is null)
+		if (cameraView.SelectedCamera is null || !IsInitialized || mediaCapture is null)
 		{
 			return;
 		}
 
-		if (cameraView.SelectedCamera is null)
-		{
-			throw new CameraException($"Unable to update Capture Resolution because {nameof(ICameraView)}.{nameof(ICameraView.SelectedCamera)} is null.");
-		}
-
 		var filteredPropertiesList = cameraView.SelectedCamera.ImageEncodingProperties.Where(p => p.Width <= resolution.Width && p.Height <= resolution.Height).ToList();
 
 		if (filteredPropertiesList.Count is 0)

src/CommunityToolkit.Maui.Camera/Handlers/CameraViewHandler.shared.cs

@@ -107,8 +107,6 @@ protected virtual void Dispose(bool disposing)
 		{
 			cameraManager?.Dispose();
 			cameraManager = null;
-
-			cameraProvider.Dispose();
 		}
 	}