Support for External Displays (HDMI/Type-C) with Background Control on Android

[REQUIRED] Use case description

When the androidx/media app is used with an external display connected via a wired connection (e.g., USB-C to HDMI), the app should support displaying the video output exclusively on the external display. The phone should act solely as a controller, allowing the user to interact with the androidx/media appinterface or switch to other apps without affecting the content being displayed on the external monitor.

Proposed solution

This would emulate the behavior seen in applications like VLC, where the phone can turn off its screen or run other applications in the background without disrupting the playback on the external display.

Alternatives considered

https://stackoverflow.com/questions/54953778/displaying-video-on-secondary-screen-using-android-presentation-class
https://github.com/VNAPNIC/presentation-displays
https://github.com/66668/AndroidPresentationDemo