First step in refactoring Index.java

Handles the following refators:
 - Indexing code into: DatabaseIndexingManager
 - Indexing utility methods into: DatabaseIndexingUtil
 - XML Parsiing utility methods into XMLParserUtil

Bug: 33451851
Test: make RunSettingsRoboTests
Change-Id: I4264ad3806d1bd3a66d879c16ad6c8315ecb832b

src/com/android/settings/search2/SearchFeatureProvider.java

@@ -46,4 +46,14 @@ public interface SearchFeatureProvider {
      * Returns a new loader to search installed apps.
      */
     InstalledAppResultLoader getInstalledAppSearchLoader(Context context, String query);
+
+    /**
+     * Returns the manager for indexing Settings data.
+     */
+    DatabaseIndexingManager getIndexingManager(Context context);
+
+    /**
+     * Updates the Settings indexes
+     */
+    void updateIndex(Context context);
 }