[native] [18/40] RN 0.70: Fix custom icons in dev mode

Summary:
expo-dev-client isn't able to show these fonts unless we preload them. This diff resolves ENG-2395, and it gets rid of the warning from ENG-1978.

Depends on D5911

Test Plan: Tested along with whole stack: test plan

Reviewers: tomek, bartek

Subscribers: atul

Differential Revision: https://phab.comm.dev/D5912