Support audio via content hub
Today we don't have a default player for audio files, Music App can play audio but files are copied and persisted in Music folder. MediaPlayer can read audio files but is not shown when we request to play from a third party app via Content hub. This MR address that.
fixes #21 (closed)
Also for easier testing purpose, allow to build that app as a click package and setup a CI
Edited by Lionel Duboeuf