Clean up MapboxToken subscriptions when DistanceRequest unmounts

[neil-marcellini]

Problem

As described here, we aren't cleaning up our Onxy.connect subscriptions, App state listener, and timeout from the MapboxToken library when the DistanceRequest component un-mounts. That's a bit of a waste.

Solution

Clean up when the DistanceRequest component un-mounts.

[tgolen]

PR is up for this: #25408

[tgolen]

Depending on the order of how things get merged...

If #24306 is merged first, then #25408 will need to be updated to tie into the unmount of the DistanceRequest component.

If #25408 is merged first, then #24306 will need to be updated to use Mapbox.stop()

[hayata-suenaga]

If #25408 is merged first, then #24306 will need to be updated to use Mapbox.stop()

#25408 has been merged first. Updating my PR to use the stop method to cleanup listeners

[melvin-bot]

@tgolen Uh oh! This issue is overdue by 2 days. Don't forget to update your issues!

[tgolen]

This is done and all deployed.