FR: Callable function on Trace object that lets us cancel the trace without logging it, rather than using stop

Sometimes if the ViewController changes while a trace is in progress, we want to abandon the trace as the VC may or may not finish the process we're tracking. Calling stop() on the trace will log an incomplete trace, which is not what we want as it will negatively affect the average elapsed time reported in the console. I couldn't find any indication that this feature already exists, but it'd be great if we could call something like cancel() on the trace to abort it without logging the results. Basically the same thing as stop() just without the reporting to Firebase.

Thanks!