NAYPIDAW, July 3 — Where is Aung San Suu Kyi?Myanmar’s deposed leader is under house arrest in the capital Naypyidaw, according to her captors, but exactly where is hard to say in a city experts describe as purpose-built to guard its closed-ranks rulers’ secrets.With a population of just one million and a landmass nine times that of New York, Naypyidaw is a labyrinth of anonymous compounds connected by deserted 20-lane highways through tracts of…