Refine network error message

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="account_setup_error_network">Network </string>

    <string name="account_setup_error_network">Network error. Please check your connection status and try again.</string>

    <string name="account_setup_error_unknown">Unknown error</string>

    <string name="account_setup_auto_discovery_validation_error_email_address_required">Email address is required.</string>