Log undo button click

Also fix a bug where we logged workspace swipe upon clicking undo, since
rebinding the pages causes us to reset mCurrentPage = 0 followed by
setCurrentPage(pageBoundFirst). Since the page isn't actually visibly
changing, we shouldn't log in that case.

Bug: 118758133
Change-Id: Ie87164a8c7c278680f67dee75657210bd33408a4
diff --git a/src/com/android/launcher3/DeleteDropTarget.java b/src/com/android/launcher3/DeleteDropTarget.java
index 8cbad20..3347b2a 100644
--- a/src/com/android/launcher3/DeleteDropTarget.java
+++ b/src/com/android/launcher3/DeleteDropTarget.java
@@ -16,6 +16,9 @@
 
 package com.android.launcher3;
 
+import static com.android.launcher3.userevent.nano.LauncherLogProto.Action.Touch.TAP;
+import static com.android.launcher3.userevent.nano.LauncherLogProto.ControlType.UNDO;
+
 import android.content.Context;
 import android.text.TextUtils;
 import android.util.AttributeSet;
@@ -121,8 +124,12 @@
             int itemPage = mLauncher.getWorkspace().getCurrentPage();
             onAccessibilityDrop(null, item);
             ModelWriter modelWriter = mLauncher.getModelWriter();
+            Runnable onUndoClicked = () -> {
+                modelWriter.abortDelete(itemPage);
+                mLauncher.getUserEventDispatcher().logActionOnControl(TAP, UNDO);
+            };
             Snackbar.show(mLauncher, R.string.item_removed, R.string.undo,
-                    modelWriter::commitDelete, () -> modelWriter.abortDelete(itemPage));
+                    modelWriter::commitDelete, onUndoClicked);
         }
     }