bpf programs: switch from integers to #define'd bpfloader versions am: b6efc7f168

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/18992474

Change-Id: I1fa03989c10600d209262c210bbef1befa5437e8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>