[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/network/NetworkProviderSettings.java

@@ -828,10 +828,12 @@ public class NetworkProviderSettings extends RestrictedSettingsFragment
 
     @VisibleForTesting
     void setAdditionalSettingsSummaries() {
-        mConfigureWifiSettingsPreference.setSummary(getString(
-                isWifiWakeupEnabled()
-                        ? R.string.wifi_configure_settings_preference_summary_wakeup_on
-                        : R.string.wifi_configure_settings_preference_summary_wakeup_off));
+        if (!FeatureFlagUtils.isEnabled(getContext(), FeatureFlagUtils.SETTINGS_PROVIDER_MODEL)) {
+            mConfigureWifiSettingsPreference.setSummary(getString(
+                    isWifiWakeupEnabled()
+                            ? R.string.wifi_configure_settings_preference_summary_wakeup_on
+                            : R.string.wifi_configure_settings_preference_summary_wakeup_off));
+        }
 
         final int numSavedNetworks = mWifiPickerTracker.getNumSavedNetworks();
         final int numSavedSubscriptions = mWifiPickerTracker.getNumSavedSubscriptions();