GoPro: Implement automatic GoPro clock set

[Pedals2Paddles]

The capability exists to set the GoPro's date/time. This should be implemented to sync the GoPro clock with the vehicle clock, which is set by GPS. The existing function to do so is here (https://github.com/OpenSolo/shotmanager/blob/master/GoProManager.py#L364) but is it not called or used by anything. This function should be called sometime after initialization once the GoPro is on and communicating.

[ereish64]

I know this issue is ancient, but i'm curious how I would call the update_gopro_time command. Is it a MAVLink command?