Yes, you also got this right. These Negrito people are
still found throughout Malaysia to Papua New Guinea all the way to
Philippines and even still found in Taiwan (whom they call them the
小黑人).
Whenever the Negritos were, the Malayo-Polynesian people
took over their homelands.
Poor things.
The Nicobars have the purest Negritos and the Indian govt
protect them as no visitors are allowed there other than a few
health officials stationed there.