Adds zakcohen@ to OWNERS.

Change-Id: I3d7b1474913e9b0459f298813ef6607b3485618b
diff --git a/OWNERS b/OWNERS
index 538ca33..7340e84 100644
--- a/OWNERS
+++ b/OWNERS
@@ -10,6 +10,7 @@
 sunnygoyal@google.com
 twickham@google.com
 winsonc@google.com
+zakcohen@google.com
 
 per-file FeatureFlags.java = sunnygoyal@google.com, adamcohen@google.com
 per-file BaseFlags.java = sunnygoyal@google.com, adamcohen@google.com