Merge lp://staging/~aacid/media-hub/unity8_snap_is_unity into lp://staging/media-hub

I bet this works, but I think it would be better to fix the "is this appid a package" logic. Because now unity8 is a normal package and doesn't need that special-casing. And fixing that logic would let other snaps play music too.

Indeed, you are right Michael. Use this as a temporary workaround until the rework in media-hub happens.

@Albert: do you have plans to land this still or is your understanding that we'll back up and do this the right way up front?

I don't know to be honest, haven't been involved in unity8-snap for a while. At some point i think this became unneeded as we didn't have media-hub on the unity8-snap anymore, but not sure if that was a workaround or not.

Indeed we dropped media-hub for the moment, until it gets more snap-aware.

So this branch itself isn't urgent. I think we still want to back up and do this the right way, but I think from the unity8 side, we're willing to wait until you media-hub folks prioritize it.

Ok, good to know. Chunsang is currently working on getting media-hub fully working for audio playback use cases under Unity8 snap session. So if we run into needing to fix this issue with this work we'll definitely prioritize doing it the right way rather than the workaround.