add more stubs to make exoplayer not crash

src/api-impl/android/media/MediaDescription.java

@@ -0,0 +1,30 @@
+package android.media;
+
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.os.Bundle;
+
+public class MediaDescription {
+
+	public static class Builder {
+
+		public Builder setMediaId(String mediaId) {return this;}
+
+		public Builder setTitle(CharSequence title) {return this;}
+
+		public Builder setSubtitle(CharSequence subtitle) {return this;}
+
+		public Builder setDescription(CharSequence description) {return this;}
+
+		public Builder setIconBitmap(Bitmap iconBitmap) {return this;}
+
+		public Builder setIconUri(Uri iconUri) {return this;}
+
+		public Builder setExtras(Bundle extras) {return this;}
+
+		public MediaDescription build() {
+			return new MediaDescription();
+		}
+	}
+	
+}