Fix bug #12910775 Settings crash after tap on Access Point Names under Mobile networks

- use the public Intent name for calling the correct activity in Settings

Change-Id: I44f0deeb1cd5dc18ecf08620dad157894e2a198b
diff --git a/res/xml/gsm_umts_options.xml b/res/xml/gsm_umts_options.xml
index b2539a7..1156f91 100644
--- a/res/xml/gsm_umts_options.xml
+++ b/res/xml/gsm_umts_options.xml
@@ -22,9 +22,7 @@
         android:title="@string/apn_settings"
         android:persistent="false">
 
-        <intent android:action="android.intent.action.MAIN"
-            android:targetPackage="com.android.settings"
-            android:targetClass="com.android.settings.ApnSettings" />
+        <intent android:action="android.settings.APN_SETTINGS" />
 
     </PreferenceScreen>