Subscriber Worker Queue: Stop Connection

[AndyTWF]

Implement the following worker:

• StopConnection

This worker is called when a consumer calls subscriber.stop(). It calls ably.close(), marks the subscriber as stopped, sets all trackables as offline (do check the TODO comment in Android on this bit) and then notifies the caller of success via callback.

If the subscriber is already stopped, and doWhenStopped is called, then the user callback should be called with success.

[sync-by-unito]

➤ Automation for Jira commented:

The link to the corresponding Jira issue is https://ably.atlassian.net/browse/SDK-3403