We suppressed the direct error throwing ability in <unknown commit>
to avoid throwing errors later in the playlist too early. This
logic got moved to MaskingMediaSource in <unknown commit>, but its
original purpose was no longer needed when the player stopped
calling this method directly in <unknown commit>.
This left a pending bug that any other usage of MaskingMediaSource
(e.g. within AdsMediaSource) no longer forwards source prepare
errors.
Issue: androidx/media#2337
PiperOrigin-RevId: 750537823