Show error when user pulls to refresh without network connection

Bug: 32012818
Test: Manually test when network is connected/not connected.
Change-Id: Ic6aabc8c52dca0886f28dda136f7e6e265cfe1f5
diff --git a/res/values/strings.xml b/res/values/strings.xml
index f92d80f..8ac6f3f 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -1833,4 +1833,7 @@
 
     <!-- Confirm button text for dialog to turn auto-sync on [CHAR LIMIT=30] -->
     <string name="turn_auto_sync_on_dialog_confirm_btn">Turn on</string>
+
+    <!-- No network connection error message [CHAR LIMIT=50] -->
+    <string name="connection_error_message">No connection</string>
 </resources>