Merge "Support testing upload/download packets" am: 139f43509e am: 911bd90d33 am: 8d8cf85d5c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1903463

Change-Id: I1664ffa4b8a3ecdfc7177c198636cafb13548b24