ViewStub for AudioView in ConversationItems

// FREEBIE

src/org/thoughtcrime/securesms/util/views/Stub.java

@@ -1,20 +1,22 @@
 package org.thoughtcrime.securesms.util.views;
 
 
+import android.support.annotation.NonNull;
 import android.view.ViewStub;
 
 public class Stub<T> {
 
-  private final ViewStub viewStub;
+  private ViewStub viewStub;
   private T view;
 
-  public Stub(ViewStub viewStub) {
+  public Stub(@NonNull ViewStub viewStub) {
     this.viewStub = viewStub;
   }
 
   public T get() {
     if (view == null) {
       view = (T)viewStub.inflate();
+      viewStub = null;
     }
 
     return view;