Get and set the automatic running state for this manager. When this is true, the manager will call AdaptivePerformance.AdaptivePerformanceManagerSettings.StartSubsystems and AdaptivePerformance.AdaptivePerformanceManagerSettings.StopSubsystems APIs at appropriate times. When false, or when AdaptivePerformanceManagerSettings.automaticLoading is false, it is up to the user of the manager to handle that same functionality.