Latest Update 2021-03-06 : New image showing the new "Services" in Home Assistant and got some tips from the comments below.
Credits and thanks: Home Assistant Forum users & Github users: @ocso, @wiphye, @teachingbirds, @tboyce1, @simbesh, @JeffLIrion @ff12 @rebmemer @siaox @DiederikvandenB @Thebuz @clapbr @Finsterclown
Start apps on your android device (in the examples below, my Nvidia Shield TV) from Home Assistant
Starts Youtube App
entity_id: media_player.shield command: >-