[native] render the rest of the user avatars

Summary:
Render the rest of the user avatars. Since the logic for rendering the remaining user avatars in our app was pretty similar, I decided to package it all in one diff

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Depends on D7057

Linear Task: https://linear.app/comm/issue/ENG-3107/build-out-a-dummy-avatar-component-and-render-it-everywhere-we-will

Test Plan:
Please look at the screenshots to see the changes I made:

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Reviewers: ashoat, atul

Reviewed By: ashoat

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D7069