ethernet: rename methods in EthernetNetworkFactory

For clarity, renaming the following functions:
getBestNetworkScore() -> getNetworkScore()
destroy() -> unregisterNetworkOfferAndStop()

This is more inline with their behavior and the other functions in
EthernetNetworkFactory.

Test: TH
Change-Id: I3250bdb91e15433ce89354bed46d011f634f3da5
1 file changed