PricewaterhouseCoopers (PwC) has been in charge of the Oscar ballot process for 89 years, keeping sole custody of the votes and tabulations of each ballot. The Academy of Motion Picture Arts and Sciences has put the New York-based accounting firm in charge of maintaining that the awards process runs smoothly. However, no record goes untarnished. PwC took responsibility on Monday when “La La Land” was mistakenly announced as Best Picture at the Academy Awards, by co-presenters Faye Dunaway and…