[automerger skipped] Send tethered interface callbacks based on interface existence. am: 0c30d949df -s ours

am skip reason: Change-Id I015219cbd03626c38fb5156d0cb2991ba7d7def7 with SHA-1 165b456d92 is in history

Change-Id: I798052af6ff6704c9088c3e0f2952b1ccc41d94b
tree: 383b74744be1be63e8bd7e62b7fb70b52491a1a5
  1. service-t/
  2. tests/