Session State
class SessionState(var firstEventId: String, var firstEventTimestamp: String, var sessionId: String, var previousSessionId: String?, var sessionIndex: Int, var userId: String, var storage: String = "LOCAL_STORAGE", var eventIndex: Int? = null, var lastUpdate: Long? = null) : State
Stores the current Session information. Used in creating the client_session entity when sessionContext is configured.