fix(DIA-1314): don't show empty state while Discover Something New collection is loading

[iskounen]

BEFORE	AFTER
https://github.com/user-attachments/assets/e8de90c1-4073-400e-be13-94b1e1f28b36	https://github.com/user-attachments/assets/582ab048-288b-4358-a981-55f5db78e2da

PR Checklist

• I have tested my changes on the following platforms:
  • Android.
  • iOS.
• I hid my changes behind a feature flag, or they don't need one.
• I have included screenshots or videos at least on Android, or I have not changed the UI.
• I have added tests, or my changes don't require any.
• I added an app state migration, or my changes do not require one.
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To the reviewers 👀

• I would like at least one of the reviewers to run this PR on the simulator or device.

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