Modifies String for better translation

Bug: 36084159
Test: Build
Change-Id: I506eae9079efdfa1490aa3bb9db955121853b7d7
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 6701fec..8bb18af 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -96,7 +96,7 @@
     <!-- Button label on the "Missing voicemail number" dialog -->
     <string name="add_vm_number_str">Add number</string>
     <!--Toast in Call settings when asked to launch voicemail for a guest user -->
-    <string name="voice_number_setting_primary_user_only">Voice mail for Call settings can only be changed by the primary user.</string>
+    <string name="voice_number_setting_primary_user_only">Voicemail Settings can only be modified by the Primary User.</string>
 
     <!-- Status message displayed on SIM PIN unlock panel -->
     <string name="puk_unlocked">Your SIM card has been unblocked. Your phone is unlocking\u2026</string>