The iOS app implementation differs from the Android app when it consumes the announcements feed endpoint.
https://gerrit.wikimedia.org/r/#/c/327224/4..5 and other patches brought up several inconsistencies:
- text - Android app expects HTML-formatted text, iOS app cannot handle HTML tags
- image. The iOS app uses image_url instead.
- caption_HTML - must be <p>-wrapped for iOS, must NOT be for Android
We should try to be more consistent so we don't run into copy&paste issues down the road.