[WIFI] Remove System APIs overlays added as part of Wi-Fi mainline

The removed 4 overlays are unnecessarily shared between connectivity
and Wi-Fi: there's no reason or requirement to assume they are identical.

Having them as System API would necessitate a formal API - getters.

Therefore, remove them as System API. Duplicate them within the Wi-Fi
mainline module.

Bug: 144764992
Test: atest android.net.wifi
Test: atest ConnectivityServiceTest
Test: atest com.android.server.wifi
Change-Id: I529f2c3afcf8476ec6e884825d60291a43dc1fcb
8 files changed
tree: 9c1867cf1905ea40c1b2d0211f924bbc965d48ad
  1. apex/
  2. service/
  3. PREUPLOAD.cfg