Set "Fi Network" SPN in default carrier config.

T-Mobile: IMSI prefix is 31026097
USCC: IMSI prefix is 3115801
3UK: GID1 is 0306

Sprint is currently unsupported as there is no way to distinguish Fi
profiles from Sprint retail profiles with the current implementation.

Bug: 72324245
Test: runtest carrierconfig-unit; Verify SPN override with Fi SIM and
      no Fi app.
Change-Id: I86355b1d31a73267b4715f47c27fd97008bfbbc3
diff --git a/assets/carrier_config_23420.xml b/assets/carrier_config_23420.xml
index 7310c07..d3861af 100644
--- a/assets/carrier_config_23420.xml
+++ b/assets/carrier_config_23420.xml
@@ -12,4 +12,8 @@
             <item value="23486" />
         </string-array>
     </carrier_config>
+    <carrier_config gid1="0306">
+        <boolean name="carrier_name_override_bool" value="true" />
+        <string name="carrier_name_string">Fi Network</string>
+    </carrier_config>
 </carrier_config_list>
diff --git a/assets/carrier_config_310260.xml b/assets/carrier_config_310260.xml
index 8a53206..4b9d5e0 100644
--- a/assets/carrier_config_310260.xml
+++ b/assets/carrier_config_310260.xml
@@ -19,4 +19,8 @@
         <boolean name="carrier_name_override_bool" value="true" />
         <string name="carrier_name_string">T-Mobile</string>
     </carrier_config>
+    <carrier_config imsi="^31026097.*">
+        <boolean name="carrier_name_override_bool" value="true" />
+        <string name="carrier_name_string">Fi Network</string>
+    </carrier_config>
 </carrier_config_list>
diff --git a/assets/carrier_config_311580.xml b/assets/carrier_config_311580.xml
index 13c271e..9ecbcbb 100644
--- a/assets/carrier_config_311580.xml
+++ b/assets/carrier_config_311580.xml
@@ -21,4 +21,8 @@
         <boolean name="show_apn_setting_cdma_bool" value="true" />
         <boolean name="support_swap_after_merge_bool" value="false" />
     </carrier_config>
+    <carrier_config imsi="^3115801.*">
+        <boolean name="carrier_name_override_bool" value="true" />
+        <string name="carrier_name_string">Fi Network</string>
+    </carrier_config>
 </carrier_config_list>