Add CtsNetTestCases to TEST_MAPPING am: ad380c1de6 am: 94358c4c9e

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1612014

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4588f5e7e4444a34bc152b9ce71f1a8645548368
tree: c3d5283730be8a16ee8732fd43891966c732a19d
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING