add an ebpf offload tethering statistics map

Test: build, atest
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I1c3b2f2d61bd139f14548e7731bb14f897e450e4
diff --git a/server/TrafficController.cpp b/server/TrafficController.cpp
index d676ac5..d91407f 100644
--- a/server/TrafficController.cpp
+++ b/server/TrafficController.cpp
@@ -236,6 +236,8 @@
 
     RETURN_IF_NOT_OK(changeOwnerAndMode(TETHER_INGRESS_MAP_PATH, AID_NETWORK_STACK,
                                         "TetherIngressMap", S_IRGRP | S_IWGRP));
+    RETURN_IF_NOT_OK(changeOwnerAndMode(TETHER_STATS_MAP_PATH, AID_NETWORK_STACK, "TetherStatsMap",
+                                        S_IRGRP | S_IWGRP));
 
     // The programs must be readable to process that modify iptables rules
     RETURN_IF_NOT_OK(changeOwnerAndMode(XT_BPF_EGRESS_PROG_PATH, AID_NET_ADMIN,