add mpv-android pre release version

metadata/is.xyz.mpv.txt

@@ -0,0 +1,25 @@
+Categories:Multimedia
+License:MIT
+Web Site:
+Source Code:https://github.com/mpv-android/mpv-android
+Issue Tracker:https://github.com/mpv-android/mpv-android/issues
+
+Name:mpv-android(pre-release)
+Auto Name:mpv
+Summary:Advanced media player
+Description:
+A simple Android wrapper around the libmpv library provided by mpv.
+.
+
+Repo Type:git
+Repo:https://github.com/mpv-android/mpv-android.git
+
+Build:2017-02-20-alpha,4
+    commit=mpv-android-2017-02-20
+    subdir=app
+    gradle=yes
+
+Auto Update Mode:None
+Update Check Mode:Tags
+Current Version:2017-02-20-alpha
+Current Version Code:4