[native] render the rest of the thread avatars

Summary:
rendered the rest of thread avatars which included the thread list thread and the chat thread list item

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Depends on D7137

Test Plan:
Please check out the screenshots to see the changes that I made:

Thread list:

staff user:

non staff user:

Chat thread list:

staff user:

non staff user:

Reviewers: ashoat, atul

Reviewed By: ashoat

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D7138