1008 replace smooth seeking with scrubbingmode

[StaehliJ]

Description

Media3 introduce scrubbingMode to ExoPlayer that does exactly what Pillarbox smooth seeking is doing. The goal of this PR is to replace it with the media3 way.

Changes made

• Change SimpleProgressTracker that handle also scrubbingMode
• Old SmoothingSeekingProgressTrackerState is now dedicated to thumbnail seeking from player image track.

Checklist

• 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).

[github-actions]

Code Coverage

Overall Project	48.07% -0.67%	🟢
Files changed	13.47%	🟢

Module	Coverage
:pillarbox-player	57.49% -0.56%	🟢
:pillarbox-cast	29.19% -0.05%	🟢
:pillarbox-cast-receiver	20.01%	🟢
:pillarbox-ui	3.62% -3.06%	🟢

Files

Module	File	Coverage
:pillarbox-player	PillarboxExoPlayer.kt	88.57%	🟢
	PillarboxAnalyticsCollector.kt	87.13%	🟢
	PillarboxBuilder.kt	79.17%	🟢
	PillarboxLoadControl.kt	78.26%	🟢
	PillarboxPlayer.kt	5.36%	🟢
	PillarboxAnalyticsListener.kt	0%	🟢
	PillarboxSessionCommands.kt	0% -9.32%	🟢
	PillarboxMediaController.kt	0% -1.83%	🟢
	PillarboxMediaSession.kt	0%	🟢
	MediaSessionCallbackImpl.kt	0% -9.81%	🟢
:pillarbox-cast	PillarboxCastPlayer.kt	1.07% -0.1%	🟢
:pillarbox-cast-receiver	PillarboxCastReceiverPlayer.kt	0%	🟢
:pillarbox-ui	ImageProgressTrackerState.kt	0% -57.34%	🟢
	SimpleProgressTrackerState.kt	0% -57.35%	🟢