Fix issue with result callback from gif search.

app/src/main/java/org/thoughtcrime/securesms/conversation/ConversationParentFragment.java

@@ -3355,6 +3355,11 @@ public class ConversationParentFragment extends Fragment
     }
   }
 
+  @Override
+  public void openGifSearch() {
+    AttachmentManager.selectGif(this, ConversationParentFragment.PICK_GIF, isMms());
+  }
+
   @Override
   public void onGifSelectSuccess(@NonNull Uri blobUri, int width, int height) {
     setMedia(blobUri,