[WifiSetup] Make dialogs immersive

Added a dialog specific applyImmersiveFlags method that adds
immersive flags without the LAYOUT_ flags. The LAYOUT_ flags causes
the dialog to not resize when IME is visible, and the dialog doesn't
need to be drawn under the navigation / status bars anyway.

Bug: 17759269
Change-Id: I0186e85d9f398af73c511b1a5ec6e83febe97f83

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

@@ -16,6 +16,7 @@
 
 package com.android.settings.wifi;
 
+import android.app.Dialog;
 import android.content.Intent;
 import android.net.wifi.WifiConfiguration;
 import android.os.Bundle;
@@ -29,6 +30,7 @@ import android.widget.ListView;
 import android.widget.TextView;
 
 import com.android.settings.R;
+import com.android.settings.SetupWizardUtils;
 
 /**
  * This customized version of WifiSettings is shown to the user only during Setup Wizard. Menu
@@ -118,6 +120,13 @@ public class WifiSettingsForSetupWizard extends WifiSettings {
         // Do not show menu during setup wizard
     }
 
+    @Override
+    public Dialog onCreateDialog(int dialogId) {
+        final Dialog dialog = super.onCreateDialog(dialogId);
+        SetupWizardUtils.applyImmersiveFlags(dialog);
+        return dialog;
+    }
+
     @Override
     protected void connect(final WifiConfiguration config) {
         WifiSetupActivity activity = (WifiSetupActivity) getActivity();