Improve Preference highlighting

- use PreferenceFragment.onBindPreferences() to launch  highlighting
- improve SettingsPreferenceFragment code for highlighting: now we can
find the View to highlight thru its Tag if there is no ListAdapter available
- add HighlightingFragment for highlighting a View from its tag/key. This
is dealing with cases when the content is custom and not relying on
SettingsPreferenceFragment (like DataUsageSummary)

Also:

- improve DataUsageSummary so that onResume() is not recreating the
Tabs all the time
- add missing "android:keys" on some Security Settings preference files

Change-Id: Ib1dd8238fe2fb57c151d584c0810a0e0a5ad97c4

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

@@ -28,7 +28,7 @@ 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 = 109;
+    private static final int DATABASE_VERSION = 110;
 
     public interface Tables {
         public static final String TABLE_PREFS_INDEX = "prefs_index";