Merge changes from topic "ender-wifi" into gce-dev

* changes:
  Virtual WIFI, stage 4: Makefiles
  Virtual WIFI, stage 3: virtual wifi management
  Virtual WIFI, stage 2: netlink commands and mac80211_hwsim header
  Virtual WIFI, stage 1: netlink interface.
tree: 99a9d272517a3075f5279e152c14a2ad4a6a0988
  1. common/
  2. external/
  3. guest/
  4. host/
  5. tools/
  6. Android.bp
  7. Android.mk
  8. BUILD
  9. WORKSPACE