Before this commit, we only sent the list of connected devices to the odoo instance (thanks to `self.send_alldevices`) when a device is newly connected. Now, we also send this list when a device is disconnected. We also try to call this method once if multiple devices are connected/disconnected during an iteration. task-id 1939338 closes odoo/odoo#32678 Signed-off-by: Quentin Lejeune (qle) <qle@odoo.com>