By DEE-ANN DURBIN, AP Business WriterPepsiCo said Monday it’s acquiring the prebiotic soda brand Poppi for $1.95 billion.The acquisition gives PepsiCo a fast-growing brand in the popular functional beverage category.“More than ever, consumers are looking for convenient and great-tasting options that fit their lifestyles and respond to their growing interest in health and wellness,” PepsiCo…