Change title of "Enhanced 4G LTE Mode" per carrier config

Bug: 30629746
Change-Id: Id3df02c2c06e02fe48b7877aafa1c55c28cebafa
diff --git a/res/values/strings.xml b/res/values/strings.xml
index d549653..35c31c0 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -450,6 +450,8 @@
     </string-array>
     <!-- Cellular network 4G title [CHAR LIMIT=30] -->
     <string name="enhanced_4g_lte_mode_title">Enhanced 4G LTE Mode</string>
+    <!-- Carrier variant of Enhaced 4G LTE Mode title.  [CHAR LIMIT=50] -->
+    <string name="enhanced_4g_lte_mode_title_variant">Advanced Calling</string>
     <!-- Cellular network 4G summary [CHAR LIMIT=80] -->
     <string name="enhanced_4g_lte_mode_summary">Use LTE services to improve voice and other communications (recommended)</string>