By Aditya Kalra and Abhirup Roy MUMBAI (Reuters) -Reliance Industries said on Thursday it would open outlets of Pret A Manger in India under a franchise deal with the British sandwich and coffee chain, a first foray by the Indian firm in the country’s growing food and beverage industry. Reliance Brands Ltd (RBL), a unit of the conglomerate that also runs India’s biggest retail chain, would start by opening branches of Pret, as the brand is known in Britain, in big Indian cities, both companies said. RBL Chief Executive Darshan Mehta said in joint statement the partnership was “rooted in the st…