Fix tethering unit test fail in R am: 9eac605333 am: b582c81ee8 am: 52998bed1d

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

Change-Id: Ibd5608cc054f2d24c30997a55977e1fcf42a2e12
tree: 7b8a014c47d67d0ce832b541ba57ee804528b5f9
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING