Improve BPF tethering counters. am: 72ec3ba88a am: 66609d3f3e am: b9b629f273

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1580284

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic04ac7bf95106f5f1b02ae360f4b90da68fe7e5a
tree: 34b31955f4efc6a16291316ead0875630f635669
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING