Add external Preferences indexing

- define SettingsSearchIndexablesProvider as an internal
SearchIndexablesProvider
- protect access thru using android.permission.READ_SEARCH_INDEXABLES
- update WallpaperTypeSettings and WifiSettings for taking care of
the new model
- update the Dashboard for taking care about external Icons for the
search result
- update sqlite model/version for taking care about Intents
(enable launching external applications for showing the settings)

Change-Id: I2e38599327e6480f1754f52666becce0884cee9d

src/com/android/settings/search/SearchIndexableRaw.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2014 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.settings.search;
+
+import android.content.Context;
+import android.provider.SearchIndexableData;
+
+/**
+ * Indexable raw data for Search.
+ *
+ * This is the raw data used by the Indexer and should match its data model.
+ *
+ * See {@link Indexable} and {@link android.provider.SearchIndexableResource}.
+ */
+public class SearchIndexableRaw extends SearchIndexableData {
+
+    public String title;
+    public String summary;
+    public String keywords;
+
+    public String screenTitle;
+
+    public SearchIndexableRaw(Context context) {
+        super(context);
+    }
+}