Add jimictw@ to core networking OWNERS.

Change-Id: I8c3b23ab091f843c07f3709a971866033ef912e0
diff --git a/OWNERS_core_networking b/OWNERS_core_networking
index 078ccde..4b73639 100644
--- a/OWNERS_core_networking
+++ b/OWNERS_core_networking
@@ -1,4 +1,5 @@
 jchalard@google.com
+jimictw@google.com
 junyulai@google.com
 lorenzo@google.com
 maze@google.com