Merge changes I46ebd8e7,Iee374b9e,I9e32eff0,Idd907c4b

* changes:
  WifiDiagnostics: test a log call
  move WifiDiagnostics creation from facade to injector
  WifiDiagnostics: move to WifiLog API
  WifiService: add WifiLog interface
tree: 936e7f73870bc270f1dd435b90f17f6207365125
  1. libwifi_hal/
  2. libwifi_system/
  3. service/
  4. tests/