Add a dummy activity which we can catch on-click in launcher to open allapps/widgets

Change-Id: Idc718a9e03e7358f972c59fcfc3bf2eaf75e56ee
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index a5a90d2..664b763 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -2000,6 +2000,12 @@
         if (tag instanceof ShortcutInfo) {
             // Open shortcut
             final Intent intent = ((ShortcutInfo) tag).intent;
+
+            ComponentName widgetComp = new ComponentName(this, WidgetAdder.class);
+            if (intent.getComponent().getClassName().equals(widgetComp.getClassName())) {
+                showAllApps(true);
+                return;
+            }
             int[] pos = new int[2];
             v.getLocationOnScreen(pos);
             intent.setSourceBounds(new Rect(pos[0], pos[1],