Modify the agent header to detect whether the connection is made from a publisher or a subscriber

[KacperKluka]

We would like to be able to determine from the agent header whether a connection is made by a publisher or a subscriber. Right now the header is ably-asset-tracking-XYZ (where XYZ can be android or swift). We could add "publisher" or "subscriber" text as a suffix or a prefix to the header (e.g. publisher-ably-asset-tracking-android) or we could perhaps add another agent header that would simply say publisher or subscriber.

This change will also require a PR in the common repo that modifies the agent headers definitions.

If we will work on this issue we should create appropriate issues in all platform repositories.

[sync-by-unito]

➤ Automation for Jira commented:

The link to the corresponding Jira issue is https://ably.atlassian.net/browse/SDK-2887