[lib] Don't run InitialStateSharingHandler while logged out

Summary:
This addresses ENG-9372.

The log spam is occurring because of the getAuthMetadata call here. We can avoid it by only calling getAuthMetadata while logged in.

Test Plan: Confirm that the log spam no longer appears while logged out

Reviewers: tomek, kamil

Reviewed By: kamil

Differential Revision: https://phab.comm.dev/D13458