ethernet: stop using EthernetManager shims

Also update the runner to DevSdkIgnoreRunner, as the default runner
would crash trying to load referenced classes like
InterfaceStateListener on S: they are only part of the updatable
bootclasspath in T+.

Bug: 171872016
Test: atest EthernetManagerTest
Change-Id: Ia38f3b86a70ccfd06a8c17392fbbb1586ed6bb7e
Merged-In: Ia38f3b86a70ccfd06a8c17392fbbb1586ed6bb7e
1 file changed