Adding support for requesting addition of shortcut/widget

on the workspace.

Bug: 33584624
Change-Id: I664366822fe8088742faff2cce006239ab0771bc

src/com/android/launcher3/BaseActivity.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2017 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;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.ContextWrapper;
+import android.view.View.AccessibilityDelegate;
+
+public abstract class BaseActivity extends Activity {
+
+    protected DeviceProfile mDeviceProfile;
+
+    public DeviceProfile getDeviceProfile() {
+        return mDeviceProfile;
+    }
+
+    public AccessibilityDelegate getAccessibilityDelegate() {
+        return null;
+    }
+
+    public static BaseActivity fromContext(Context context) {
+        if (context instanceof BaseActivity) {
+            return (BaseActivity) context;
+        }
+        return ((BaseActivity) ((ContextWrapper) context).getBaseContext());
+    }
+}