Add Search.SOURCE to android-common

Part of http://b/issue?id=2429556

Change-Id: I1e37e092c8a1319d5f703b065dba8a6fbde31db5

common/java/com/android/common/Search.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2010 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.common;
+
+/**
+ * Utilities for search implementations.
+ *
+ * @see android.app.SearchManager
+ */
+public class Search {
+
+    /**
+     * Key for the source identifier set by the application that launched a search intent.
+     * The identifier is search-source specific string. It can be used
+     * by the search provider to keep statistics of where searches are started from.
+     *
+     * The source identifier is stored in the {@link android.app.SearchManager#APP_DATA}
+     * Bundle in {@link android.content.Intent#ACTION_SEARCH} and
+     * {@link android.content.Intent#ACTION_WEB_SEARCH} intents.
+     */
+    public final static String SOURCE = "source";
+
+    private Search() { }   // don't instantiate
+}