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/SearchFeatureProviderImpl.java

@@ -23,6 +23,8 @@ import android.view.Menu;
 import android.view.MenuItem;
 
 import com.android.settings.R;
+import com.android.settings.search.Index;
+
 import com.android.settings.applications.PackageManagerWrapperImpl;
 
 /**
@@ -31,6 +33,7 @@ import com.android.settings.applications.PackageManagerWrapperImpl;
 public class SearchFeatureProviderImpl implements SearchFeatureProvider {
     protected Context mContext;
 
+    private DatabaseIndexingManager mDatabaseIndexingManager;
 
     public SearchFeatureProviderImpl(Context context) {
         mContext = context;
@@ -71,4 +74,22 @@ public class SearchFeatureProviderImpl implements SearchFeatureProvider {
         return new InstalledAppResultLoader(
                 context, new PackageManagerWrapperImpl(context.getPackageManager()), query);
     }
+
+    @Override
+    public DatabaseIndexingManager getIndexingManager(Context context) {
+        if (mDatabaseIndexingManager == null) {
+            mDatabaseIndexingManager = new DatabaseIndexingManager(context.getApplicationContext(),
+                    context.getPackageName());
+        }
+        return mDatabaseIndexingManager;
+    }
+
+    @Override
+    public void updateIndex(Context context) {
+        if (isEnabled()) {
+            getIndexingManager(context).update();
+        } else {
+            Index.getInstance(context).update();
+        }
+    }
 }