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/dream/WhenToDreamPicker.java

@@ -21,13 +21,19 @@ import android.content.Context;
 import android.graphics.drawable.Drawable;
 
 import com.android.settings.R;
+import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settings.widget.RadioButtonPickerFragment;
 import com.android.settingslib.dream.DreamBackend;
+import com.android.settingslib.search.SearchIndexable;
 import com.android.settingslib.widget.CandidateInfo;
 
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * Settings screen for decide when to start screen saver
+ */
+@SearchIndexable
 public class WhenToDreamPicker extends RadioButtonPickerFragment {
 
     private static final String TAG = "WhenToDreamPicker";
@@ -120,4 +126,7 @@ public class WhenToDreamPicker extends RadioButtonPickerFragment {
             return key;
         }
     }
+
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider(R.xml.when_to_dream_settings);
 }