Merge "Mark EthernetManagerTest as @ConnectivityModuleTest" am: c2cbabf590

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2127855

Change-Id: I202d127e683537e697b5584cc651ed0c318d119c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>