bpf netd: Add blocking for ingress local network calls.

Blocking ingress traffic which is disallowed in
local_net_access_map. The permission check will be
introduced in subsequent changes.

Test: Tested locally by temporarily allowing egress traffic but
blocking ingress.

Bug: 381099600
Change-Id: If796c5232640da162442ca5c114b94b18a6c9b0d
1 file changed