fix: bluez device disconnection

Author: szymonlesisz

src/bluez/adapter.rs

@@ -143,11 +143,15 @@ async fn central_event(
                 Some(CentralEvent::DeviceDiscovered(device.id.into()))
             }
             DeviceEvent::Connected { connected } => {
-                let device = session.get_device_info(&id).await.ok()?;
-                if connected {
-                    Some(CentralEvent::DeviceConnected(device.id.into()))
+                // device may be unknown if unpaired manually from the system
+                let device = session.get_device_info(&id).await;
+                if device.is_ok() && connected {
+                    Some(CentralEvent::DeviceConnected(id.into()))
+                } else if !connected {
+                    Some(CentralEvent::DeviceDisconnected(id.into()))
                 } else {
-                    Some(CentralEvent::DeviceDisconnected(device.id.into()))
+                    // unexpected state. connected without device_info
+                    None
                 }
             }
             DeviceEvent::Rssi { rssi: _ } => {