tianyifeng 2c8d07c2dd Inform DefaultPreloadManager when player uses PreloadMediaSource
Add a new method `onUsedByPlayer(PreloadMediaSource)` for `PreloadMediaSource.PreloadControl`, which will be invoked when the player starts to use the `PreloadMediaSource`, or calling `PreloadMediaSource.preload` while the player is already using that source. `DefaultPreloadManager` will immediately preload the next source when receiving `onUsedByPlayer` event.

PiperOrigin-RevId: 616789121
2024-03-18 04:54:49 -07:00
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2024-02-15 02:35:12 -08:00