Fixes missing WW logs for drag and drop events.

Change-Id: I31f8aa132d70b42c3b8213daf0bbd5c555cf3895
diff --git a/src/com/android/launcher3/BaseDraggingActivity.java b/src/com/android/launcher3/BaseDraggingActivity.java
index 239d8a3..0ac2784 100644
--- a/src/com/android/launcher3/BaseDraggingActivity.java
+++ b/src/com/android/launcher3/BaseDraggingActivity.java
@@ -184,7 +184,7 @@
             }
             getUserEventDispatcher().logAppLaunch(v, intent, user);
             getStatsLogManager().log(LAUNCHER_APP_LAUNCH_TAP, item == null ? null
-                    : item.buildProto(null));
+                    : item.buildProto());
             return true;
         } catch (NullPointerException|ActivityNotFoundException|SecurityException e) {
             Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT).show();