Fix broken collapsable notifs in badge only threads on iOS
Summary: When user receives notification with collapse id in badge only thread it will result in notification with "ENCRYPTED" body. This diff fixes that.
Test Plan:
- Prior to this diff every collapsable notif (image, change settings etc.) resulted in ENCRYPTED notifs in a badge-only thread on iOS.
- After this diff the issue is fixed.
Reviewers: tomek, kamil, ashoat
Reviewed By: tomek
Differential Revision: https://phab.comm.dev/D13265