[native] move emoji avatar creation from profile directory to components directory

Summary:
This is a move diff, I want to move this component to components directory since both profile and chat will be using this. Probably should have done this from the get go

Depends on D7378

Test Plan: flow

Reviewers: ashoat, atul

Reviewed By: ashoat

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D7423