Update models for QoS

[MGaetan89]

Pull request

Description

Following recent discussions, I've updated the models related to QoS.

Changes made

• Update the existing models for QoS to match the latest agreement.
• Move all QoS-related models into a dedicated models package.
• Update the Context.getDeviceType() extension in QoSSession to support DESKTOP, and return UNKNOWN by default (instead of PHONE).

Checklist

• 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).
• All pull request status checks pass.

[github-actions]

Code Coverage

Overall Project	53.98% -0.02%	🟢
Files changed	98.89%	🟢

Module	Coverage
:pillarbox-player	60.25% -0.04%	🟢

Files

Module	File	Coverage
:pillarbox-player	QoSMessageHandler.kt	100%	🟢
	QoSEvent.kt	100%	🟢
	QoSScreen.kt	100%	🟢
	QoSSessionTimings.kt	100%	🟢
	QoSMedia.kt	100%	🟢
	QoSSession.kt	100%	🟢
	QoSMessage.kt	100%	🟢
	QoSOS.kt	100%	🟢
	QoSPlayer.kt	100%	🟢
	QoSDevice.kt	100%	🟢
	QoSStall.kt	100%	🟢
	QoSError.kt	97.18% -2.82%	🟢
	QoSCoordinator.kt	86.01% -0.93%	🟢