Add DeviceType to Info and a filter function for it

* Add DeviceType to Info
* Update adapters to also register its device type
* Add FilterDeviceType

pkg/driver/camera/camera_linux.go

@@ -49,7 +49,8 @@ func init() {
 	for _, device := range devices {
 		cam := newCamera(searchPath + device.Name())
 		driver.GetManager().Register(cam, driver.Info{
-			Label: device.Name(),
+			Label:      device.Name(),
+			DeviceType: driver.Camera,
 		})
 	}
 }