Add service ping setting module specs

app/services/service_ping/service_ping_settings.rb

+# frozen_string_literal: true
+
+module ServicePing
+  module ServicePingSettings
+    class << self
+      def product_intelligence_enabled?
+        pings_enabled? && !User.single_user&.requires_usage_stats_consent?
+      end
+
+      def pings_enabled?
+        ::Gitlab::CurrentSettings.usage_ping_enabled?
+      end
+    end
+  end
+end