[native] clean up profile UI for users with long usernames

Summary:
As I was working, I encountered a situation where users with long usernames had a profile that was not correctly aligned/styled

Here are the designs for reference:

Test Plan:
Please see screenshots:

Before:

After:

Reviewers: atul, inka

Reviewed By: atul

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D9013