Add IPv4 counters. am: d561b7f67c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1580287

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4c2c1c0e7dd032a148f798030f668767bfd2a029
tree: 7d80298942ce3d9296dc9b6aa99d9a7717b61db7
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING