How to let the aircraft fly with waypoint speed in waypointV2Mission?

If the firmware controller firmware version is later than 3.2.10.0, user can override the waypointV2Mission autoFlightSpeed by defining the waypoint autoFlightSpeed. If user doesn't define waypointV2Mission  autoFlightSpeed, it will be set to default value zero, the speed can be controlled by remote controller only, the aircraft will hover in air if user does not touch the control stick. If user doesn't set the waypoint autoFlightSpeed, the waypoint speed will follow waypointV2Mission autoFlightSpeed. Also, user needs to call setUsingWaypointAutoFlightSpeed to enable using waypoint autoFlightSpeed.