Allow notification media player controls

**Is your feature request related to a problem? Please describe.**
No it is not related to a problem, I was just wondering about how I could integrate contextual locations/rooms into Home Assistant.
In order to realise this, a few other things are needed, one of them is this feature request.
It would be nice if a notify service call could make an media player notification show up on a device, and with that, specifying which media_player component should handle the play/pause back/next controls and which media_player component should handle the volume controls (which I think should replace the thumbs on the image below)

**Describe the solution you'd like**
HomeAssistant should integrate the mediaplayer controls as seen in the image below, but then for specific media_player entities, one used for playback control and another one used for volume control.

**Describe alternatives you've considered, if any**
None.

**Additional context**