Add new SPN format for "WiFi Call".

Adding a new SPN format string per carrier requirements.

Test: Manual CC override to new SPN format and verify the string is "WiFi Call".
Bug: 236213596
Change-Id: I304fd8c643c01ab9a9cbfd4c2a3ca4f8ac2644b8

core/res/res/values/strings.xml

@@ -327,6 +327,7 @@
         <item>@string/wfcSpnFormat_wifi_calling_wo_hyphen</item>
         <item>@string/wfcSpnFormat_vowifi</item>
         <item>@string/wfcSpnFormat_spn_wifi_calling_vo_hyphen</item>
+        <item>@string/wfcSpnFormat_wifi_call</item>
     </string-array>
 
     <!-- Spn during Wi-Fi Calling: "<operator>" -->
@@ -353,6 +354,8 @@
     <string name="wfcSpnFormat_wifi_calling_wo_hyphen">WiFi Calling</string>
     <!-- Spn during Wi-Fi Calling: "VoWifi" -->
     <string name="wfcSpnFormat_vowifi">VoWifi</string>
+    <!-- Spn during Wi_Fi Calling: "WiFi Call" (without hyphen).  This string is shown in the call banner for calls which take place over a WiFi network. -->
+    <string name="wfcSpnFormat_wifi_call">WiFi Call</string>
 
     <!-- WFC, summary for Disabled -->
     <string name="wifi_calling_off_summary">Off</string>

telephony/java/android/telephony/CarrierConfigManager.java

@@ -1629,6 +1629,7 @@ public class CarrierConfigManager {
      * <li>  9: WiFi Calling</li>
      * <li> 10: VoWifi</li>
      * <li> 11: %s WiFi Calling</li>
+     * <li> 12: WiFi Call</li>
      * @hide
      */
     public static final String KEY_WFC_SPN_FORMAT_IDX_INT = "wfc_spn_format_idx_int";