add UniversalMusicPlayer

Author: Joker

README.md

@@ -53,6 +53,7 @@ App Name                   | Describe                  | Major Language
 [JamsMusicPlayer](https://github.com/psaravan/JamsMusicPlayer) | A free, powerful and elegant music player for Android. | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=com.jams.music.player.de.repat)   
 [Mizuu](https://github.com/MizzleDK/Mizuu) | Popular media indexer app for Android. http://mizuu.tv | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=com.miz.mizuu)   
 [MPDroid](https://github.com/abarisain/dmix) | Fork of pmix that allows streaming (and now much more) | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=com.namelessdev.mpdroid)   
+[UniversalMusicPlayer](https://github.com/googlesamples/android-UniversalMusicPlayer) | This sample shows how to implement an audio media app that works across multiple form factors and provide a consistent user experience on Android phones, tablets, Auto, Wear and Cast devices | Java |      
 
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