If someone had reported that Angola was preparing its state oil company for privatization three years ago, many would have laughed refused to believe it. In 2016, Sonangol was in shambles and rumor got around that the company couldn’t even afford to buy toilet paper for its offices. Now three years later, it is preparing for an initial public offering. A lot has changed since 2016, and not just in oil prices. At the time, the head of the company was Isabel dos Santos, the billionaire daughter of then-president Jose Eduardo dos Santos who…