Fix common tests on Q and R

The common tests cannot reference EthernetNetworkSpecifier,
as it did not exist in Q and R yet.

Bug: 179329291
Merged-In: Iec8ef874a3ca6dcc65944bbbaa3575a5ae0f4989
Change-Id: Iec8ef874a3ca6dcc65944bbbaa3575a5ae0f4989
Test: atest CtsNetTestCasesLatestSdk
2 files changed