[Provider Model] Preferences Settings UI change

- Change the title from “Wi-Fi preference” to “Preferences”
- Change the summary from “Wi-Fi turns back on automatically” to
“Connect to public networks”
- Remove “Turn on Wi-Fi automatically” preference
- Screenshot:
  https://screenshot.googleplex.com/Areywyb46deK9VQ
  https://screenshot.googleplex.com/6H5Z4PxA5tWXZ6S

Bug: 172788645
Test: manual test
Change-Id: Ibce21f1d740a139b407a0a9a41f2cb4c4e34776c

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

@@ -26,6 +26,7 @@ import android.content.IntentFilter;
 import android.location.LocationManager;
 import android.net.wifi.WifiManager;
 import android.provider.Settings;
+import android.util.FeatureFlagUtils;
 
 import androidx.annotation.VisibleForTesting;
 import androidx.fragment.app.Fragment;
@@ -44,6 +45,7 @@ import com.android.settingslib.core.lifecycle.events.OnResume;
  * {@link TogglePreferenceController} that controls whether the Wi-Fi Wakeup feature should be
  * enabled.
  */
+// TODO(b/167474581): Should clean up this controller when Provider Model finished.
 public class WifiWakeupPreferenceController extends TogglePreferenceController implements
         LifecycleObserver, OnPause, OnResume {
 
@@ -89,6 +91,9 @@ public class WifiWakeupPreferenceController extends TogglePreferenceController i
 
     @Override
     public int getAvailabilityStatus() {
+        if (FeatureFlagUtils.isEnabled(mContext, FeatureFlagUtils.SETTINGS_PROVIDER_MODEL)) {
+            return CONDITIONALLY_UNAVAILABLE;
+        }
         return AVAILABLE;
     }