The saving grace of these strange Olympics: Tokyo’s 24-hour convenience stores, or conbini, as they are known in Japan.Credit...James Hill for The New York Times TOKYO — On languid bus rides from one Olympic venue to another, a panorama of gustatory pleasures rolls by: noodle joints, skewer shops, sushi counters. We stare at it all through tinted glass: It is like a mirage of the people we are not