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/webview/WebViewAppPicker.java

@@ -33,11 +33,17 @@ import androidx.annotation.VisibleForTesting;
 
 import com.android.settings.R;
 import com.android.settings.applications.defaultapps.DefaultAppPickerFragment;
+import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settingslib.applications.DefaultAppInfo;
+import com.android.settingslib.search.SearchIndexable;
 
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * Settings picker screen to handle Web implementation
+ */
+@SearchIndexable
 public class WebViewAppPicker extends DefaultAppPickerFragment {
     private WebViewUpdateServiceWrapper mWebViewUpdateServiceWrapper;
 
@@ -164,4 +170,7 @@ public class WebViewAppPicker extends DefaultAppPickerFragment {
         }
         return null;
     }
+
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider(R.xml.webview_app_settings);
 }