Revert "bpfloader: Android V requires kernel 4.19+" am: 2733d97683 am: 69c27a5cd1

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/2658975

Change-Id: I0867c2d93fec4336b02ebc20ff79993337336040
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>