Merge changes from topics "user_remove_extra_user", "wifi_net_utils"

* changes:
  UserManagerService: Add UserHandle extra to user added/removed broadcast
  wifi-service: Jar-Jar net util library
  WifiManager: Add API to query STA + AP concurrency
tree: 8aeb152f740d554284dc3f1e0e5d53af529b2d93
  1. Tethering/