Add deny firewall chain for OEM

Bug: 207773349
Bug: 208371987
Test: atest
CtsNetTestCases:android.net.cts.ConnectivityManagerTest#testFirewallBlocking
--iterations 50 && atest ConnectivityServiceTest --iterations 10

Change-Id: I60d5540821abcced03356f366775f16ee369d7f9
diff --git a/bpf_progs/bpf_shared.h b/bpf_progs/bpf_shared.h
index 634fbf4..2afb789 100644
--- a/bpf_progs/bpf_shared.h
+++ b/bpf_progs/bpf_shared.h
@@ -133,6 +133,8 @@
     LOW_POWER_STANDBY_MATCH = (1 << 6),
     IIF_MATCH = (1 << 7),
     LOCKDOWN_VPN_MATCH = (1 << 8),
+    OEM_DENY_1_MATCH = (1 << 9),
+    OEM_DENY_2_MATCH = (1 << 10),
 };
 
 enum BpfPermissionMatch {