Revert string resource to previous version.

Reverting outgoing_call_not_allowed_user_restriction as the newest
version doesn't make sense.

Bug: 25005066
Change-Id: I65760624fd1159758659d38ec8f64c1aeac574a5
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 26df574..cdae003 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -85,7 +85,7 @@
 
     <!-- Message indicating that the user is not allowed to make non-emergency outgoing phone calls
          due to a user restriction -->
-    <string name="outgoing_call_not_allowed_user_restriction">Only emergency calls are allowed by the device owner.</string>
+    <string name="outgoing_call_not_allowed_user_restriction">Only emergency calls are allowed.</string>
 
     <!-- Message indicating that the user is not allowed to make non-emergency outgoing phone calls
          due to the lack of the CALL_PHONE permission -->