ethernet: remove callback from factory updateInterfaceLinkState

updateInterfaceLinkState already returns true / false depending on the
success, so the EthernetCallback can be removed and sent from
EthernetTracker instead.

Test: atest EthernetManagerTest
Bug: 225317892
Change-Id: Id6ae7929097840ac5c9a4d244fdf669a06b94ed5
4 files changed