Merge changes I48d53705,I2379d9ea,I16805cda,I9579d00b into qt-dev

* changes:
  p2p: unit tests for WifiP2pNative
  p2p: unit tests for SupplicantP2pIfaceCallback
  p2p: unit tests for WifiP2pNative
  p2p: add unit tests for WifiP2pServiceImpl