Send a stop event when closing the player modal

[amtins]

As a member of the ADI team, I'd like a stop event to be sent when I close the player modal, in order to be more consistent with the visual.

Acceptance criteria

• create a new player instance each time the modal is opened.
• destroy player instance when modal is closed (player.dispose())

Refers to the ADI team e-mail of 24.11.2023 - Mediapulse - Streaming Validation - Pillarbox Demo Apps