Fix brown-paper-bag bug in audio init error checking

app/src/main/java/com/limelight/binding/audio/AndroidAudioRenderer.java

@@ -149,6 +149,7 @@ public class AndroidAudioRenderer implements AudioRenderer {
                 break;
             } catch (Exception e) {
                 // Try to release the AudioTrack if we got far enough
+                e.printStackTrace();
                 try {
                     if (track != null) {
                         track.release();
@@ -158,6 +159,11 @@ public class AndroidAudioRenderer implements AudioRenderer {
             }
         }
 
+        if (track == null) {
+            // Couldn't create any audio track for playback
+            return -2;
+        }
+
         return 0;
     }