MILAN — When he remodelled the garden of his home in Milan, Giorgio Armani added a pavilion, a wall of bamboo and an imposing pair of Japanese maples, transforming an awkwardly inclined courtyard into the kind of spare, contemplative space you might find at the heart of a ryokan in Kyoto. The ideal spot, in other words, for a fashion samurai, a lion in the winter of his years, to sit back and quietly reflect on his achievements.
But Giorgio…