Hide Chat icon behind feature flag

Ticket(s) / Related Merge Requests

Summary of Changes

Hide the chat icon in the header behind a feature flag until the chat app is sorted out in google play.

Testing Considerations

N/A

Deployment Considerations

Regression Scope

Platform Affected (web, mobile, etc)

Both

Developer Testing Completed

Screenshots / Screen Recording

Does this impact

• Localization
• Dark/light mode
• Guest mode

Definition of Done Checklist

• The Acceptance Criteria has been met
• Code is tested: Testing includes unit/spec, E2E/automated and manual testing
• Merge requests description has been filled out