Emitted after we try to sync more than FAILED_SYNC_ERROR_THRESHOLD
times and are still failing. Or when we enounter a hard error like the
token being invalid.
Emitted after the first sync events are ready (this could even be sync events from the cache)
Emitted for each time we try reconnecting. Will switch to Error after
we reach the FAILED_SYNC_ERROR_THRESHOLD
Emitted when the sync loop is no longer running
Emitted after each sync request happens
Emitted after a connectivity error and we're ready to start syncing again