arc: Add explicit error message in case network cannot be setup.

chrome/app/chromeos_strings.grdp

Index: chrome/app/chromeos_strings.grdp
diff --git a/chrome/app/chromeos_strings.grdp b/chrome/app/chromeos_strings.grdp
index 0da7c2e9189b2a003da9a40d7a292122b37eecff..e9defe12fb018c5f20772f17e12a4b9b8cb64118 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -6592,6 +6592,9 @@ All users must sign out to continue.
   <message name="IDS_ARC_ANDROID_MANAGEMENT_REQUIRED_ERROR" desc="Error message shown when Android management is required for an unmanaged Chrome OS user.">
     Your organization has not enabled Google Play Store for your account. Contact your administrator for more information.
   </message>
+  <message name="IDS_ARC_NETWORK_UNAVAILABLE_ERROR" desc="Error message shown when Android cannot set up network connection.">
+    Network connection cannot be established.
+  </message>
   <message name="IDS_ARC_CRITICALLY_LOW_DISK_NOTIFICATION_TITLE" desc="Title of the notification warning users that they are critically low on disk space and Android apps can not be launched.">
     Device disk space critically low
   </message>