Adjust call to build-aml-prebuilts.sh. It no longer sets variables specific for module building. Cherry-picked from https://r.android.com/1729792. Test: See https://r.android.com/1729335 Bug: 190194345 Bug: 174315599 Change-Id: I81fdf11da2dc22a4313cb4e068b63090ac98a2a7 Merged-In: I81fdf11da2dc22a4313cb4e068b63090ac98a2a7