Merge "WifiStateMachine: Return null link layer stats" into nyc-dev
am: e3235277e0

* commit 'e3235277e0bef27f51c50a1ddb74acbd80c996d5':
  WifiStateMachine: Return null link layer stats

Change-Id: I448e7b4e21db8446285eae6a576596c455cae39e
tree: bcee8937414289ad87edefb2435ff9c95a7adcf9
  1. service/
  2. tests/