[Housekeeping] Clean up AvatarView sample namespaces (#2546) · ne0rrmatrix/MauiOld@337cbf6

Parameter 'mauiContext' is unread.

Parameter 'cameraView' is unread.

Parameter 'cameraProvider' is unread.

'Expander.ContentProperty' hides inherited member 'ContentView.ContentProperty'. Use the new keyword if hiding was intended.

'Expander.Content' hides inherited member 'ContentView.Content'. Use the new keyword if hiding was intended.

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