BEIJING (Reuters) -The leaders of China and Indonesia pledged to scale up trade and expand cooperation in areas such as agriculture and food security, following a rare visit to COVID-wary China by a foreign head of state. Indonesian President Joko Widodo met Chinese President Xi Jinping and Premier Li Keqiang in Beijing on Tuesday. China last hosted foreign leaders during the Winter Olympics in February, with Russian President Vladimir Putin among those who visited Beijing. The commitment by China, Indonesia’s No.1 trading partner, to deepen trade relations and fully back Indonesia’s chairmans…