Refactor MobileNetworkSettings to use fragment framework.

Bug: 35157859
Test: UI change only.
Change-Id: Ib0d471803904d73f1621fc0c049554f00b732c16
diff --git a/src/com/android/phone/PhoneGlobals.java b/src/com/android/phone/PhoneGlobals.java
index 5008604..88ff579 100644
--- a/src/com/android/phone/PhoneGlobals.java
+++ b/src/com/android/phone/PhoneGlobals.java
@@ -336,7 +336,7 @@
             registerReceiver(mReceiver, intentFilter);
 
             //set the default values for the preferences in the phone.
-            PreferenceManager.setDefaultValues(this, R.xml.network_setting, false);
+            PreferenceManager.setDefaultValues(this, R.xml.network_setting_fragment, false);
 
             PreferenceManager.setDefaultValues(this, R.xml.call_feature_setting, false);