Update Network & internet->Wi-Fi to use MasterSwitchPreference.

- Add a preference controller for Network & internet->Wi-Fi to control
  the preference toggling and summary update.
- Refactor WifiSettings and WifiEnabler to share code between the new
  wifi preference controller and the wifi setting.
- Refactor BluetoothSummaryHelper to have a common base class with the
  WifiSummaryHelper.
- Rename the summary helper to summary updater.

Bug: 34280769
Test: make RunSettingsRoboTests
Change-Id: I00ebfc161bcef89331bb41ba405ed8cb8232d248

src/com/android/settings/bluetooth/BluetoothMasterSwitchPreferenceController.java

@@ -25,12 +25,13 @@ import com.android.settings.core.lifecycle.events.OnResume;
 import com.android.settings.core.lifecycle.events.OnStart;
 import com.android.settings.core.lifecycle.events.OnStop;
 import com.android.settings.overlay.FeatureFactory;
+import com.android.settings.widget.SummaryUpdater.OnSummaryChangeListener;
 import com.android.settings.widget.MasterSwitchPreference;
 import com.android.settings.widget.MasterSwitchController;
 import com.android.settingslib.bluetooth.LocalBluetoothManager;
 
 public class BluetoothMasterSwitchPreferenceController extends PreferenceController
-        implements BluetoothSummaryHelper.OnSummaryChangeListener,
+        implements OnSummaryChangeListener,
         LifecycleObserver, OnResume, OnPause, OnStart, OnStop {
 
     private static final String KEY_TOGGLE_BLUETOOTH = "toggle_bluetooth";
@@ -38,14 +39,13 @@ public class BluetoothMasterSwitchPreferenceController extends PreferenceControl
     private LocalBluetoothManager mBluetoothManager;
     private MasterSwitchPreference mBtPreference;
     private BluetoothEnabler mBluetoothEnabler;
-    private BluetoothSummaryHelper mSummaryHelper;
+    private BluetoothSummaryUpdater mSummaryUpdater;
 
     public BluetoothMasterSwitchPreferenceController(Context context,
             LocalBluetoothManager bluetoothManager) {
         super(context);
         mBluetoothManager = bluetoothManager;
-        mSummaryHelper = new BluetoothSummaryHelper(mContext, mBluetoothManager);
-        mSummaryHelper.setOnSummaryChangeListener(this);
+        mSummaryUpdater = new BluetoothSummaryUpdater(mContext, this, mBluetoothManager);
     }
 
     @Override
@@ -68,12 +68,12 @@ public class BluetoothMasterSwitchPreferenceController extends PreferenceControl
     }
 
     public void onResume() {
-        mSummaryHelper.setListening(true);
+        mSummaryUpdater.register(true);
     }
 
     @Override
     public void onPause() {
-        mSummaryHelper.setListening(false);
+        mSummaryUpdater.register(false);
     }
 
     @Override