John Hopewell Chief International CorrespondentIt is fitting in many ways that Movistar Plus’ “Riot Police” (“Antidisturbios”) saw its world premiere in a theater at one of Europe’s biggest film festivals: September’s San Sebastian in Spain.Feted by the domestic press — “the best Spanish series of the year,” trumpeted newspaper El Mundo — the Movistar Plus original series has closed sales to France and Latin America with “partners of the highest caliber,” “Riot Police” producer Domingo Corral,