Merge "prevent nullptr dereference when calling unwanted" am: 03f03d7acf am: 07060e39fd am: cc1a711197 am: aa073db020

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

Change-Id: I284fd6a75f75870e015d94692bd781bd89653dc1
tree: 9e21659c123cb35d557caaa38ed84cbb945f696f
  1. service-t/
  2. tests/