Set observable string field to MediaLibraryItem

medialibrary/build.gradle

@@ -46,6 +46,10 @@ android {
             proguardFile 'proguard.cfg'
         }
     }
+
+    dataBinding {
+        enabled = true
+    }
 }
 
 dependencies {

medialibrary/src/org/videolan/medialibrary/media/MediaLibraryItem.java

 package org.videolan.medialibrary.media;
 
+import android.databinding.ObservableField;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -21,8 +22,8 @@ public abstract class MediaLibraryItem implements Parcelable {
     public abstract int getItemType();
 
     long mId;
-    protected String mTitle;
-    protected String mDescription;
+    protected String mTitle, mDescription;
+    public ObservableField<String> observableDescription = null;
 
     protected MediaLibraryItem() {}