[lib] Make sure PeerToPeerMessageHandler is run after persisted state is read

Summary:
https://linear.app/comm/issue/ENG-9803/make-sure-peertopeermessagehandler-run-after-persisted-state-is-read

Depends on D13814

Test Plan:

1. Use logs to verify if PeerToPeerMessageHandler waits for persisted state
2. Comment out sqliteAPI.removeInboundP2PMessages and send some messages and restart the app
3. Errors like invalid operation should appear
4. After this patch there should be less of them

Reviewers: tomek, kamil, ashoat

Reviewed By: ashoat

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D13802