bpf netd: block local network calls on egress

Add method that will perform lookup in trie map and identify
if destination for packet is local network.

If the packet is for local network, we will drop it.
This logic will be paired with permission in future.

Test: Locally tested by adding values from userspace and
sending packets to same address.

Bug: 373608607
Change-Id: If58edf2be717931f160ccbbd86cea35e4463aff4
1 file changed