fix: initial device state after setup flow

Set the device state to connected after adding a new device in the
setup flow. Otherwise, the web-configurator might show the integration
as disconnected.

intg-denonavr/driver.py

@@ -315,6 +315,7 @@ def _register_available_entities(device: config.AvrDevice, receiver: avr.DenonDe
 def on_device_added(device: config.AvrDevice) -> None:
     """Handle a newly added device in the configuration."""
     _LOG.debug("New device added: %s", device)
+    _LOOP.create_task(api.set_device_state(ucapi.DeviceStates.CONNECTED))  # just to make sure the device state is set
     _configure_new_avr(device, connect=False)