[Provider Model] Add Wi-Fi toggle

- Network & internet Settings
  - Remove “Show airplane mode networks"

- Internet Settings
  - Add “Wi-Fi” switch preference
    - Show “Find and connect to Wi-Fi networks” in summary

- Screenshot:
  https://screenshot.googleplex.com/AnoXf4qDe2jPirP

Bug: 181858434
Test: manual test
atest -c NetworkDashboardFragmentTest \
         WifiSwitchPreferenceControllerTest
make RunSettingsRoboTests ROBOTEST_FILTER=NetworkProviderSettingsTest

Change-Id: Ic420ff40cfdfb3ae29ee6f754ce139cb54651bda

src/com/android/settings/network/NetworkProviderSettings.java

@@ -196,6 +196,7 @@ public class NetworkProviderSettings extends RestrictedSettingsFragment
     private PreferenceCategory mWifiEntryPreferenceCategory;
     @VisibleForTesting
     AddWifiNetworkPreference mAddWifiNetworkPreference;
+    private WifiSwitchPreferenceController mWifiSwitchPreferenceController;
     @VisibleForTesting
     Preference mConfigureWifiSettingsPreference;
     @VisibleForTesting
@@ -270,6 +271,7 @@ public class NetworkProviderSettings extends RestrictedSettingsFragment
         addNetworkMobileProviderController();
         addViewAirplaneModeNetworksButtonController();
         addConnectedEthernetNetworkController();
+        addWifiSwitchPreferenceController();
     }
 
     private void addNetworkMobileProviderController() {
@@ -298,6 +300,14 @@ public class NetworkProviderSettings extends RestrictedSettingsFragment
         mConnectedEthernetNetworkController.displayPreference(getPreferenceScreen());
     }
 
+    private void addWifiSwitchPreferenceController() {
+        if (mWifiSwitchPreferenceController == null) {
+            mWifiSwitchPreferenceController =
+                    new WifiSwitchPreferenceController(getContext(), getSettingsLifecycle());
+        }
+        mWifiSwitchPreferenceController.displayPreference(getPreferenceScreen());
+    }
+
     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);