Migrate SPN Overrides to Carrier Config

This change migrates everything from the latest
aosp version of spn-conf.xml to Carrier Config.
This will permit the simplification of SPN
overriding logic.

Bug: 68049890
Test: compilation + boot
Change-Id: Icf12b5a7e675e3f99a4d017418c84b3d0d414a21
diff --git a/assets/carrier_config_40554.xml b/assets/carrier_config_40554.xml
index 3715948..857372d 100644
--- a/assets/carrier_config_40554.xml
+++ b/assets/carrier_config_40554.xml
@@ -5,5 +5,7 @@
             <item value="404"/>
             <item value="405"/>
         </string-array>
+        <boolean name="carrier_name_override_bool" value="true" />
+        <string name="carrier_name_string">airtel</string>
     </carrier_config>
 </carrier_config_list>