b324b8aa72
It currently wrongly documents that it is only called before reading streams (that has never been the case and all MediaPeriods already need to handle calls after reading samples from the streams). It was also a bit unclear what a discontinuity implies and the new Javadoc calls out the main use case for discontinuties and the intended meaning of returning a discontinuity. #minor-release PiperOrigin-RevId: 543989124