[lib] create new session on SESSION_DOES_NOT_EXIST error

Summary: ENG-9310.

Test Plan:

1. Open apps on devices A, B.
2. On A create session but drop session request message.
3. On A start sending message - should result in sessionDoesNotExist error.
4. Apply this patch.
5. Send message, B should create the session and A or B resend not confirmed messages, made sure that all messages are now visible on both sides, no data is missing.

Reviewers: tomek, marcin

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D13357