*** Original commit ***
Rollback of https://github.com/androidx/media/commit/fc539da0613d8703e2176fe5aa225df8cefb9c8f
*** Original commit ***
Release SequenceAssetLoader when ended
Before, the SequenceAssetLoader was released at the end of the export.
Release resources earlier if possible.
***
***
PiperOrigin-RevId: 520036433
