am 10dde211: merge from open-source master

Merge commit '10dde211457417aa1392cc3a5457728c84ed0d2f'

* commit '10dde211457417aa1392cc3a5457728c84ed0d2f':
  Remove top panel in alert dialog if empty.
diff --git a/core/java/com/android/internal/app/AlertController.java b/core/java/com/android/internal/app/AlertController.java
index 107b145..4a0617c 100644
--- a/core/java/com/android/internal/app/AlertController.java
+++ b/core/java/com/android/internal/app/AlertController.java
@@ -435,6 +435,7 @@
                 View titleTemplate = mWindow.findViewById(R.id.title_template);
                 titleTemplate.setVisibility(View.GONE);
                 mIconView.setVisibility(View.GONE);
+                topPanel.setVisibility(View.GONE);
                 hasTitle = false;
             }
         }