Add StatsLog*Manager for logging.
Bug: 113043444

Verification: (19) is our event classifier number
11-05 11:24:28.188   932   994 I statsd  : { 1541445868000000000 766293363001 (19)0x10000->1[I] 0x20000->0[I] 0x30000->0[I] 0x40000->[S] 0x50000->1[I]  }

Change-Id: I75403837f9fa8e51efa012fb708bce7efc9c4488
diff --git a/src/com/android/launcher3/DragSource.java b/src/com/android/launcher3/DragSource.java
index 93f865c..d4d7b99 100644
--- a/src/com/android/launcher3/DragSource.java
+++ b/src/com/android/launcher3/DragSource.java
@@ -19,7 +19,7 @@
 import android.view.View;
 
 import com.android.launcher3.DropTarget.DragObject;
-import com.android.launcher3.logging.UserEventDispatcher.LogContainerProvider;
+import com.android.launcher3.logging.StatsLogUtils.LogContainerProvider;
 
 /**
  * Interface defining an object that can originate a drag.