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

Change-Id: Idc718a9e03e7358f972c59fcfc3bf2eaf75e56ee
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 81d7c8b..e205fea 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -83,6 +83,17 @@
         </activity>
 
         <activity
+            android:name="com.android.launcher3.WidgetAdder"
+            android:label="@string/widget_adder"
+            android:icon="@mipmap/ic_launcher_home">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <activity
             android:name="com.android.launcher3.WallpaperChooser"
             android:theme="@style/Theme.WallpaperPicker"
             android:label="@string/pick_wallpaper"