No, it's not. Although I'd expect the whole continent to literally die off. The infection level is amazing already, and the numbers are bound to be much higher than what is actually counted.
Only thing that can save a remnant of them is to get civilized, and that's the one thing they won't do.
Hardly likely. When the rates of disease are high in these countries the population growth actually accelerates as the woman overcompensate for the potential loss of children.
Even if the rates of AIDS infection were so high as to somehow lower birth rates to replacement levels, due to demographic momentum, the population growth would continue.