Extend own capabilities fetching & caching to other feed own data

[gpunto]

Goal

AND-927

In #154 we introduced fetching & caching of feed own capabilities, to remedy the fact that they're empty in ActivityData.currentFeed on the activity added event. Now the backend allows us to fetch also other own data, i.e. follows & membership, so we're extending the logic to handle those too.

Implementation

Basically, wherever we were dealing with capabilities in #154, we now deal with FeedOwnValues instead. The logic is otherwise the same.

Testing

You can add some logging to log the own properties of ActivityData.currentFeed, then add an activity (thus triggering the activity.added event) and verifying that those own properties are enriched correctly

Checklist

• Issue linked (if any)
• Tests/docs updated
• I have signed the Stream CLA (required for external contributors)

[github-actions]

PR checklist ✅

All required conditions are satisfied:

• Title length is OK (or ignored by label).
• At least one pr: label exists.
• Sections ### Goal, ### Implementation, and ### Testing are filled.

🎉 Great job! This PR is ready for review.

[github-actions]

SDK Size Comparison 📏

SDK	Before	After	Difference	Status
stream-feeds-android-client	2.39 MB	2.39 MB	0.00 MB	🟢

[sonarqubecloud]

Quality Gate passed

Issues
5 New issues
0 Accepted issues

Measures
0 Security Hotspots
87.0% Coverage on New Code
0.3% Duplication on New Code

See analysis details on SonarQube Cloud