Settings search - Navigate user to exact page

- remove duplicate index preference
- default set searchable = false when the preference has fragment
- make some fragments indexable

Bug: 143057584
Test: robotest & manual

Change-Id: I4d64f6106d2f92f0a45e8c7e26388677f593f412

src/com/android/settings/datetime/timezone/TimeZoneSettings.java

@@ -39,7 +39,9 @@ import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.datetime.timezone.model.FilteredCountryTimeZones;
 import com.android.settings.datetime.timezone.model.TimeZoneData;
 import com.android.settings.datetime.timezone.model.TimeZoneDataLoader;
+import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.search.SearchIndexable;
 
 import java.util.ArrayList;
 import java.util.Date;
@@ -51,6 +53,7 @@ import java.util.Set;
 /**
  * The class displays a time zone picker either by regions or fixed offset time zones.
  */
+@SearchIndexable
 public class TimeZoneSettings extends DashboardFragment {
 
     private static final String TAG = "TimeZoneSettings";
@@ -387,4 +390,7 @@ public class TimeZoneSettings extends DashboardFragment {
     private String getLocaleRegionId() {
         return mLocale.getCountry().toUpperCase(Locale.US);
     }
+
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider(R.xml.time_zone_prefs);
 }