[Provider Model] Remove “Advanced” section

- Screenshot:
  https://screenshot.googleplex.com/bHB4RwhN9PBfWAF

Bug: 172788645
Test:
- manual test
- make RunSettingsRoboTests ROBOTEST_FILTER=ConfigureWifiSettingsTest

Change-Id: Id4c73911905830779004e407be9b01f4faac5268

src/com/android/settings/wifi/ConfigureWifiSettings.java

@@ -62,18 +62,6 @@ public class ConfigureWifiSettings extends DashboardFragment {
         return TAG;
     }
 
-    @Override
-    public int getInitialExpandedChildCount() {
-        int tileLimit = 1;
-        if (mWifiWakeupPreferenceController.isAvailable()) {
-            tileLimit++;
-        }
-        if (mUseOpenWifiPreferenceController.isAvailable()) {
-            tileLimit++;
-        }
-        return tileLimit;
-    }
-
     @Override
     protected int getPreferenceScreenResId() {
         return R.xml.wifi_configure_settings;