I did push another release candidate version of the Android Application in the Google Play Store testing channel, it should be available in the next few hours. The apk is available at
https://github.com/kelsos/mbrc/releases/tag/v0.10.0-rc.4 . And it also requires the latest plugin update
https://github.com/kelsos/mbrc-plugin/releases/tag/v0.13.0 . Mostly I did a few minor additions to the protocol on the plugin side however I did manage to find a small issue that would cause data to get ignored by the client.
The rc.3 features a new logo, and adds support for lockscreen controls and fullscreen cover display on devices running Android 4.0 or later. Also I had a request on github for headset controls, and since that part was related to the way the lockscreen widget works I decided to add it. Now you can play/pause with single click from the connected headset button or skip to next with a double click.
I plan on waiting for another week for any issues reported, and then I will start rolling out the new update. Afterwards I plan on releasing another minor update that will include widgets before resuming my work on Library browsing and Playlist support.
-- Update --
I found a couple of issues with the rc.3 so I did an new build fixing the issues in rc.4