Move 6 packages up from core_base.mk

Also remove two nonexistant packages (libnfc_ndef & libvariablespeed).

The moved packages are already being pulled in by being required by
other included packages in one of its parents (base or core_minimal).

These are the moved packages and their pre-existing deps:
- libmdnssd: by netd in base.mk
- libandroidfw: by 7 packages, many in base.mk
- libaudioutils: by 3 packages, e.g libmedia in base.mk
- libpowermanager: by 3 packages, e.g. libaudioflinger in base.mk
- libspeexresampler: by libaudioutils
- libwebrtc_audio_preprocessing: by libaudiopreprocessing in core_minimal.mk

This change makes core_base.mk very small. It will be deleted in a
followup-CL and its contents inlined in its direct children.

Bug: 80410283
Bug: 7456955
Test: make
Change-Id: I1240ec6adc5b9208effd6fc70892dfbd453a1fba