ClatdController - store ifindex in tracker

Test: atest netd_unit_test
Bug: 65674744
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I300dc05649d5046d45065dcc971397a0ff5dec65
diff --git a/server/ClatdController.h b/server/ClatdController.h
index 9f25d67..d2eafd9 100644
--- a/server/ClatdController.h
+++ b/server/ClatdController.h
@@ -47,6 +47,7 @@
     struct ClatdTracker {
         const NetworkController* netCtrl = nullptr;
         pid_t pid = -1;
+        unsigned ifIndex;
         char iface[IFNAMSIZ];
         Fwmark fwmark;
         char fwmarkString[UINT32_STRLEN];