Clean up bpf_headers visibility

The bpf_headers no need to explicitly specify visibility for
system/netd/libnetdbpf. The libnetdbpf depends on
bpf_connectivity_headers, which exports bpf_headers already.

Bug: 202086915
Test: m
Change-Id: I09a073b14dc74511ba9dc09a89ae6e89dff51f4d
1 file changed
tree: 22886bb8e6993ab78ea4a4d91009fac529ebf568
  1. staticlibs/