Minor formatting/refactoring

app/src/main/java/com/kabouzeid/gramophone/misc/SimpleTransitionListener.java

@@ -1,35 +1,31 @@
 package com.kabouzeid.gramophone.misc;
 
 import android.annotation.TargetApi;
+import android.os.Build;
 import android.transition.Transition;
 
 /**
  * @author Karim Abou Zeid (kabouzeid)
  */
-@TargetApi(21)
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
 public abstract class SimpleTransitionListener implements Transition.TransitionListener {
     @Override
     public void onTransitionStart(Transition transition) {
-
     }
 
     @Override
     public void onTransitionEnd(Transition transition) {
-
     }
 
     @Override
     public void onTransitionCancel(Transition transition) {
-
     }
 
     @Override
     public void onTransitionPause(Transition transition) {
-
     }
 
     @Override
     public void onTransitionResume(Transition transition) {
-
     }
 }