[native] initialize crypto account before any crypto-related operation

Summary:
The entire stack worked fine because of D10327, adding this to make sure the crypto thread is always present.

Created ENG-6419 to discuss alternatives.

Depends on D10526

Test Plan: Make sure app does not crash with recent changes

Reviewers: marcin, michal, varun

Reviewed By: marcin

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D10594