Fix tethering unit test fail in R am: 9eac605333 am: b582c81ee8

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1711436

Change-Id: Ie6c845f8169df062db77bdd0f80f591d7fb44a1b
tree: 7b8a014c47d67d0ce832b541ba57ee804528b5f9
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING