(Bloomberg) -- Chinese banks’ stockpile of foreign-currency deposits has surpassed $1 trillion for the first time, creating an opportunity for Beijing to allow greater freedom for capital to flow out of the country.The pool has been growing as surging demand for Chinese goods during the pandemic has beefed up foreign earnings of exporters, while the resilient economy and strengthening currency have lured overseas investors to sell dollars for yuan to buy Chinese stocks and bonds. Bank deposits i