Feature request: Service to update activities

[craigrouse]

It would be really useful if the integration allowed activity properties to be updated. The main one I'd find useful would be to update the sport_type property, as certain activities synced from 3rd party services come over as "workout", and I'd like to use HA to correctly set the sport type. I'm not averse to helping to develop this (though time-poor!), just opening an issue to start a discussion and see if there's any reason it couldn't be done. Thanks!