Adding support for hiding widgets from the widget tray and reconfiguring widgets

> Removing AppInfo target
> Switching between uninstall and setup based on the drag view

Bug: 63931362
Change-Id: Iccd6f965fa3d61992244a365efc242122292c0ca

tests/src/com/android/launcher3/testcomponent/AppWidgetHidden.java

@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.android.launcher3.testcomponent;
+
+import android.appwidget.AppWidgetProvider;
+
+/**
+ * A simple app widget without any configuration screen and is hidden in picker.
+ */
+public class AppWidgetHidden extends AppWidgetProvider { }