Owner David Garcia, of Little Havana’s La Camaronera, has kept his restaurant going at a brisk clip, with no staff infections, for now — Welcome to In Transit, a column from the writer Mayukh Sen focusing on how immigrant-owned restaurants across America are coping with the Covid-19 pandemic. Read previous installments here. Before he was even a teenager, David Garcia got his first job at his family’s restaurant, La Camaronera Seafood Joint and Fish…