SAN JOSE, California — Caroline Mills now goes into her San Jose office at accounting giant Ernst & Young whenever her team agrees they want to — and sometimes when the company puts on the Wednesday happy hour featuring beer, wine and Asian-fusion food-truck treats. That weekly grub-and-gab session did not exist before the pandemic, nor was a fund to pay for dog-sitting, or company-paid parking. Office attendance, for audit staffer Mills, was also not “very optional,” as it is today. “They’re definitely trying to keep us happy,” said Mills, 25, of Mountain View, “and keep employing us.” Despit…