Add preference for WiFi MAC randomization.

Preference visibility contolled by feature flag -
settings_wifi_mac_randomization.

Bug: 1227787
Test: RunSettingsRoboTests

Change-Id: Ibad8d3ea2bfa3879acc1ec883b8c03f1979bde45

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

@@ -19,6 +19,7 @@ package com.android.settings.wifi;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.os.Bundle;
+import android.util.FeatureFlagUtils;
 import android.view.View;
 import android.widget.Button;
 
@@ -93,6 +94,14 @@ public class WifiDialog extends AlertDialog implements WifiConfigUiBase,
         if (mAccessPoint == null) {
             mController.hideForgetButton();
         }
+
+        if (FeatureFlagUtils.isEnabled(getContext(),
+                com.android.settings.core.FeatureFlags.WIFI_MAC_RANDOMIZATION)) {
+            View view = mView.findViewById(R.id.privacy_settings_fields);
+            if (view != null) {
+                view.setVisibility(View.VISIBLE);
+            }
+        }
     }
 
     public void onRestoreInstanceState(Bundle savedInstanceState) {