The flag-raising ceremony on July 1 could be moved indoors for the first time since the city returned to Chinese rule if there is rain and thunderstorms, Hong Kong’s No 2 official said.Chief Secretary Matthew Cheung Kin-chung’s comment came a day after the government said the event, which marks Hong’s Kong 1997 handover after more than a century as a British colony, will be scaled down due to security concerns.The official, however, dodged the question of whether extradition bill protests could…