Implement add users to chat

Ticket(s) / Related Merge Requests

#5503

Summary of Changes

Implemented the add user to multi-user chats

Implemented the same logic of the web: The first 12 users of the chat are filtered from the user search results

Testing Considerations

check issue

Regression Scope

Multi user chat

Platform Affected (web, mobile, etc)

both

Developer Testing Completed

android

Screenshots

Does this impact

• Localization
• Dark/light mode
• Guest mode