[Telephony] Incorrect target class name

Settings class name fix.

Bug: 230047450
Change-Id: I99aa1d870157c84e33297598b93baf569af3f429
Test: local
diff --git a/res/values/config.xml b/res/values/config.xml
index 94c932c..19252c0 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -156,7 +156,7 @@
     <!-- Package name for the mobile network settings [DO NOT TRANSLATE] -->
     <string name="mobile_network_settings_package" translatable="false">com.android.settings</string>
     <!-- Class name for the mobile network settings activity [DO NOT TRANSLATE] -->
-    <string name="mobile_network_settings_class" translatable="false">com.android.settings.Settings.MobileNetworkActivity</string>
+    <string name="mobile_network_settings_class" translatable="false">com.android.settings.Settings$MobileNetworkActivity</string>
 
     <!-- CDMA activation goes through HFA -->
     <!-- DEPRECATED: Use CarrierConfigManager#KEY_USE_HFA_FOR_PROVISIONING_BOOL -->