Merge changes I11475732,I8de27f2b

* changes:
  WifiServiceImpl: check calls to enable wifi
  WifiServiceImpl: test setWifiEnabled
tree: b0450b959db7f4aff1911091d54feadca99e0140
  1. libwifi_hal/
  2. libwifi_system/
  3. service/
  4. tests/
  5. PREUPLOAD.cfg