Merge "ethernet: fix receiving NetworkOffer callbacks on stale object" am: b916ff898b

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2150733

Change-Id: I435577bd8ac42a0adcdbbb76d35d4d00ecf3a3c4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>