Use new redux action and storeLoaded field

Summary: This differential updates SQLiteContextProvider to use new redux action and set store loaded attribute in redux

Test Plan: Initialize debugging session with flipper. Open, close, repoen the app. Send messages, create drafts. Examine that payload on SET_CLIENT_DB_STORE action is always as expected.

Reviewers: atul, tomek, kamil, ashoat

Reviewed By: tomek, ashoat

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D5711