chore(ONYX-781): Mark new Activity panel feature flags as ready for release

[olerichter00]

Resolves ONYX-781

Description

Mark new Activity panel feature flags as ready for release.

PR Checklist

• [ ] I have tested my changes on iOS and Android.
• [ ] I hid my changes behind a feature flag, or they don't need one.
• [ ] I have included screenshots or videos, 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.
• [ ] I have documented any follow-up work that this PR will require, or it does not require any.
• [ ] I have added a changelog entry below, or my changes do not require one.

To the reviewers 👀

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

Changelog updates

Changelog updates

Cross-platform user-facing changes

iOS user-facing changes

Android user-facing changes

Dev changes

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[ArtsyOpenSource]

This PR contains the following changes:

• Cross-platform user-facing changes (Release Activity panel redesign 🥳 - ole)

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