Add Wi-Fi connection test for static IP

- Add support in access point parser to support static ip settings
- Add Wi-Fi test with static IP configuration
- Use WifiManager new APIs
- Fix issue: if the expected AP is not in the scan list, retry scanning.
  Maximum is 5.
- Fix issue: wait for wifi state change before connecting to AP.

Change-Id: Id09b921c8a6a4b14f3c65cdea0b58c7e6f395520