fix: Edit room info button is flickering

[OtavioStasiak]

Proposed changes

If you navigate quickly through app, sometimes the edit button does not appear. To fix this I created a ref to prevent overwriting the setHeader after loadRoom;

Issue(s)

https://rocketchat.atlassian.net/browse/NATIVE-735

How to test or reproduce

• Open the app;
• Navigate to RoomView;
• Navigate to RoomInfoView;
• Click on Edit button on Header;

PS: It's a flaky behavior, so you may need to navigate back and forth a few times to reproduce the issue (on android its easier to reproduce than iOS). (Try clicking quickly to navigate to roomInfo; it helps me reproduce it with fewer attempts.);

Screenshots

Before:

WhatsApp.Video.2024-12-16.at.18.27.42.mp4

After:

WhatsApp.Video.2024-12-16.at.18.27.34.mp4

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Documentation update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Further comments