Add Wi-Fi Calling preference screen

Change-Id: Ie89902b55c5c4184236636f5039b3246a9c0bda5
diff --git a/src/com/android/settings/SettingsActivity.java b/src/com/android/settings/SettingsActivity.java
index dc5675c..cbffa86 100644
--- a/src/com/android/settings/SettingsActivity.java
+++ b/src/com/android/settings/SettingsActivity.java
@@ -112,6 +112,7 @@
 import com.android.settings.wifi.SavedAccessPointsWifiSettings;
 import com.android.settings.wifi.WifiSettings;
 import com.android.settings.wifi.p2p.WifiP2pSettings;
+import com.android.settings.WifiCallingSettings;
 
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
@@ -302,7 +303,8 @@
             AppNotificationSettings.class.getName(),
             OtherSoundSettings.class.getName(),
             QuickLaunchSettings.class.getName(),
-            ApnSettings.class.getName()
+            ApnSettings.class.getName(),
+            WifiCallingSettings.class.getName()
     };