[native] Redux migrate drafts to sqlite

Summary: add a new redux migration, save all drafts from redux to sqlite and remove the draft key from redux store

Test Plan: run the app and see if it runs a migration and if the drafts are present in the database

Reviewers: palys-swm, karol-bisztyga

Subscribers: ashoat, KatPo, palys-swm, Adrian, atul

Differential Revision: https://phabricator.ashoat.com/D1078