Add support for "Skip intro"/"Skip credits"

[MGaetan89]

Pull request

Description

This PR adds new API to be notified when reaching the opening and closing credits.

Changes made

• Added the PillarboxPlayer.Listener.onTimeIntervalChanged(SkipableTimeInterval?) callback.
• Added the Player.getCurrentTimeIntervalAsFlow() extension.
• Added the Player.getTimeIntervals() extension.
• Added the Player.getTimeIntervalAtPosition(Long) extension`.
• Added the Player.getCurrentTimeIntervalAsState() extension.
• Refactor ChaptersTracker to be more generic.

Checklist

• [x] Your branch has been rebased onto the main branch.
• [ ] APIs have been properly documented (if relevant).
• [ ] The documentation has been updated (if relevant).
• [ ] New unit tests have been written (if relevant).
• [ ] The demo has been updated (if relevant).
• [x] All pull request status checks pass.

[github-actions[bot]]

Code Coverage

Overall Project	46.59% -0.66%	🟢
Files changed	37.44%	🟢

Module	Coverage
:pillarbox-core-business	85.02%	🟢
:pillarbox-player	47.18% -1.15%	🟢
:pillarbox-ui	0% -0.62%	🟢

Files

|Module|File|Coverage|| |:-|:-|:-|:-:| |:pillarbox-core-business|[SRGAssetLoader.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-core-business%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fcore%2Fbusiness%2Fsource%2FSRGAssetLoader.kt)|87.04%|🟢| ||[Chapter.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-core-business%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fcore%2Fbusiness%2Fintegrationlayer%2Fdata%2FChapter.kt)|54.42%|🟢| |:pillarbox-player|[Asset.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-player%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fplayer%2Fasset%2FAsset.kt)|100%|🟢| ||[PillarboxSessionCommands.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-player%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fplayer%2Fsession%2FPillarboxSessionCommands.kt)|100%|🟢| ||[PillarboxMediaSource.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-player%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fplayer%2Fsource%2FPillarboxMediaSource.kt)|90.94% **`-0.34%`**|🟢| ||[Player.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-player%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fplayer%2Fextension%2FPlayer.kt)|90.74%|🟢| ||[PlayerCallbackFlow.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-player%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fplayer%2FPlayerCallbackFlow.kt)|78.03%|🟢| ||[PillarboxExoPlayer.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-player%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fplayer%2FPillarboxExoPlayer.kt)|77.16%|🟢| ||[PillarboxMediaController.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-player%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fplayer%2Fsession%2FPillarboxMediaController.kt)|0% **`-2.33%`**|🟢| ||[PillarboxMediaSession.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-player%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fplayer%2Fsession%2FPillarboxMediaSession.kt)|0% **`-10.97%`**|🟢| ||[PillarboxPlayer.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-player%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fplayer%2FPillarboxPlayer.kt)|0%|🟢| |:pillarbox-ui|[ComposablePlayer.kt](https://github.com/SRGSSR/pillarbox-android/blob/e22ad912d243be9cab2652235436f61c49e3a9d6/pillarbox-ui%2Fsrc%2Fmain%2Fjava%2Fch%2Fsrgssr%2Fpillarbox%2Fui%2Fextension%2FComposablePlayer.kt)|0% **`-3.47%`**|🟢|