Update ethernetlegacycode to take and ignore the listener flags.

The legacy ethernet code did not understand the flags parameter.
Just ignore it; the only things the flags can do is ask the
callbacks to report new interface types like NCM which the legacy
code doesn't support anyway.

Test: None
Flag: EXEMPT refactor
Change-Id: I8e78f0fb202ccbe38548f60d4e33b3ec12c77f84
1 file changed