[Merge] lp:~chunsang/media-hub/wip_media-hub-interface into lp:media-hub

[Chunsang Jeong]

@abeato, thanks for your review. Please check the additional patch.

And for prior question about "ERROR: Failed to load hybris linker for Android SDK version 19", it's known problem which happens when not using stable-phone-overlay ppa to snap any of media player-app and media-hub, as you already figured out.
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https://code.launchpad.net/~chunsang/media-hub/wip_media-hub-interface/+merge/319896
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