NetBpfLoad: combine into one file, part one am: 6e1b4250ee am: 5aedb92c34

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3212377

Change-Id: I80049f6b1328a30a69296d08dbe2cf1494f042b5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>