Implement querySiteMapPairs for indexableProvider.

Query sitemap will return a list of pairs [parent class name, child
class name]. It's up to consumer to figure out the display name later
so the provider doesn't have dependency on localizing any display names.

- Removed SiteMapManagerTest. We will perform the test in
  SettingsIntelligence instead.
- Added test for the new provider in instrumentation test (robolectric
  doesn't recognize the new constants in framework yet)

Bug: 67359411
Bug: 64938328
Test: atest
Change-Id: Ia973115320e6b7c8cf84d4756db1763ae7010aed

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

@@ -22,6 +22,7 @@ import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
 import android.os.Build;
+import android.provider.SearchIndexablesContract.SiteMapColumns;
 import android.support.annotation.VisibleForTesting;
 import android.text.TextUtils;
 import android.util.Log;
@@ -33,7 +34,7 @@ public class IndexDatabaseHelper extends SQLiteOpenHelper {
     private static final String TAG = "IndexDatabaseHelper";
 
     private static final String DATABASE_NAME = "search_index.db";
-    private static final int DATABASE_VERSION = 117;
+    private static final int DATABASE_VERSION = 118;
 
     private static final String SHARED_PREFS_TAG = "indexing_manager";
 
@@ -80,14 +81,6 @@ public class IndexDatabaseHelper extends SQLiteOpenHelper {
         String TIME_STAMP = "timestamp";
     }
 
-    public interface SiteMapColumns {
-        String DOCID = "docid";
-        String PARENT_CLASS = "parent_class";
-        String CHILD_CLASS = "child_class";
-        String PARENT_TITLE = "parent_title";
-        String CHILD_TITLE = "child_title";
-    }
-
     private static final String CREATE_INDEX_TABLE =
             "CREATE VIRTUAL TABLE " + Tables.TABLE_PREFS_INDEX + " USING fts4" +
                     "(" +