LAPU-LAPU CITY, Cebu — Tall, dark, and handsome—or as the young-ins call it: TDH. These are the words often used to describe Brunei’s Prince Abdul Mateen, who recently turned heads while attending the 48th Association of Southeast Asian Nations (Asean) Summit in Cebu with his father, Sultan Hassanal Bolkiah. But beyond his looks and popularity,