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/accessibility/AccessibilityShortcutPreferenceFragment.java

@@ -34,10 +34,10 @@ import androidx.preference.SwitchPreference;
 
 import com.android.internal.accessibility.AccessibilityShortcutController;
 import com.android.settings.R;
-import com.android.settings.widget.SwitchBar;
 import com.android.settings.search.BaseSearchIndexProvider;
-import com.android.settingslib.search.Indexable;
+import com.android.settings.widget.SwitchBar;
 import com.android.settingslib.accessibility.AccessibilityUtils;
+import com.android.settingslib.search.Indexable;
 import com.android.settingslib.search.SearchIndexable;
 
 /**
@@ -201,11 +201,5 @@ public class AccessibilityShortcutPreferenceFragment extends ToggleFeaturePrefer
     }
 
     public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
-            new BaseSearchIndexProvider() {
-                // This fragment is for details of the shortcut. Only the shortcut itself needs
-                // to be indexed.
-                protected boolean isPageSearchEnabled(Context context) {
-                    return false;
-                }
-            };
+            new BaseSearchIndexProvider(R.xml.accessibility_shortcut_settings);
 }