Support for custom actions in PlayerControlView

[maknon]

Thank you for the new media3, such abstraction solves a lot of issues and makes the API more natural

i have implemented custom command as per #38 which reflected nicely in the notification. on the other hand, i cannot see it reflected in the PlayerControlView.

is there a way to do this.

i have implemented a workaround to utalise one of the buttons (seek to next) by overriding the exo_next view (action and drawable) but this is not a clean way.

[icbaker]

The UI components currently only use the Player interface and other components from lib-common. They have no awareness of anything that's specific to lib-session (such as custom commands).

I will keep this open as a potential enhancement, but we have to plans to work on this.