Merge changes I9c953a1c,Id082eedb,Iaf8631b5

* changes:
  WifiNative: Supplicant HIDL integration
  WifiNative: Start supplicant HIDL integration
  Remove unused/unwanted WifiNative methods
tree: 9b89d94feb78512a8ae29a107e680aaea5271b2a
  1. libwifi_hal/
  2. libwifi_system/
  3. service/
  4. tests/
  5. PREUPLOAD.cfg