[MAC rand] Avoid null Object of mac address

Bug: 140534714
Test: unit tests
Change-Id: I914a2678e62f1e2ef6dc1b358a76a306b9cc0cc4
2 files changed
tree: 97e0d659a490e40a2f0e6c132bbdb7103be081e7
  1. service/
  2. PREUPLOAD.cfg