bpf offload - make sure bpf code can access packet headers am: 8e69ec111f am: 3129be7a3b am: 4cfddb344c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1622559

Change-Id: I29df9c0df46fd67203e50d30c3ae70eaa43cfeab
tree: 43bf08787d2d92c7dfe43aa223849084c50eae77
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING