LOS ANGELES — The frantic ferocity of Manny Pacquiao’s training camps at the stuffy Wild Card Gym clearly indicate he believes every fight could be his last. This time around, the 31-year-old Pacquiao knows he truly might be done with boxing — for a while at least. Pacquiao is training in Hollywood for his March 13 welterweight fight against Joshua Clottey while simultaneously running for a congressional seat in his native Philippines.