Increased the number of songs available in discovery

app/src/main/java/com/cappielloantonio/play/viewmodel/HomeViewModel.java

@@ -38,7 +38,7 @@ public class HomeViewModel extends AndroidViewModel {
 
     public List<Song> getDiscoverSongList() {
         if(dicoverSongSample.isEmpty()) {
-            dicoverSongSample = songRepository.getRandomSample(5);
+            dicoverSongSample = songRepository.getRandomSample(10);
         }
 
         return dicoverSongSample;