Fix presentation feedback when scanning out fullscreen view

Closes: https://github.com/swaywm/sway/issues/4663

sway/desktop/output.c

@@ -472,6 +472,8 @@ static bool scan_out_fullscreen_view(struct sway_output *output,
 		return false;
 	}
 
+	wlr_presentation_surface_sampled(server.presentation, surface);
+
 	if (!wlr_output_attach_buffer(wlr_output, surface->buffer)) {
 		return false;
 	}