Remove feature flag for provider model in wifi settings

Bug: 206338507
Test: manual test
Change-Id: I1ec83c94f801b489bcc716a6d78cbe7beab9638f

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

@@ -89,9 +89,10 @@ import java.util.Optional;
 /**
  * UI for Wi-Fi settings screen
  *
- * TODO(b/167474581): This file will be deprecated at Android S, please merge your WifiSettings
+ * @deprecated This file will be deprecated at Android S, please merge your WifiSettings
  * in change in {@link NetworkProviderSettings}.
  */
+@Deprecated
 @SearchIndexable
 public class WifiSettings extends RestrictedSettingsFragment
         implements Indexable, WifiPickerTracker.WifiPickerTrackerCallback,
@@ -99,6 +100,10 @@ public class WifiSettings extends RestrictedSettingsFragment
 
     private static final String TAG = "WifiSettings";
 
+    // Set the Provider Model is always enabled
+    @VisibleForTesting
+    static Boolean IS_ENABLED_PROVIDER_MODEL = true;
+
     // IDs of context menu
     static final int MENU_ID_CONNECT = Menu.FIRST + 1;
     @VisibleForTesting
@@ -232,7 +237,7 @@ public class WifiSettings extends RestrictedSettingsFragment
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
 
-        if (Utils.isProviderModelEnabled(getContext())) {
+        if (IS_ENABLED_PROVIDER_MODEL) {
             final Intent intent = new Intent("android.settings.NETWORK_PROVIDER_SETTINGS");
             // Add FLAG_ACTIVITY_NEW_TASK and FLAG_ACTIVITY_CLEAR_TASK to avoid multiple
             // instances issue. (e.g. b/191956700)
@@ -1070,7 +1075,7 @@ public class WifiSettings extends RestrictedSettingsFragment
             new BaseSearchIndexProvider(R.xml.wifi_settings) {
                 @Override
                 protected boolean isPageSearchEnabled(Context context) {
-                    return !Utils.isProviderModelEnabled(context);
+                    return !IS_ENABLED_PROVIDER_MODEL;
                 }
 
                 @Override