By JOSEPH PISANI, AP Retail Writer NEW YORK (AP) — Toilet paper is back on store shelves. But you may not recognize some of the brands. Demand for toilet paper has been so high during the pandemic that in order to keep their shelves stocked, retailers are buying up foreign toilet paper brands, mostly from Mexico. Major chains, across the country, including CVS, Piggly Wiggly, Safeway, 7-Eleven and