This one seems to be very unofficial for Saudi Arabia. ksa-stats does not have it, neither does globalsportsarchive. Not sure what kind of team Saudi Arabia used for that game.
The Saudi team that played Latvia (in Portugal) was exactly the same squad which played hosts Portugal three days later, and another three days later Bulgaria (again in Portugal). No team had more than 6 subs, so I don't know why this game shouldn't be considered a FIFA-match. I haven't found the ksa-stats list, and even globalsportsarchive can miss a game. I googled for some match articles in Arabic and English and all hits sounded to me like a regular friendly.