Merge "prevent nullptr dereference when calling unwanted" am: 4dd2a41dd9

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1802269

Change-Id: I703f0c9fb9748cc2a211acd667f7d27a265025a7
tree: 9e21659c123cb35d557caaa38ed84cbb945f696f
  1. service-t/
  2. tests/