Update OWNERS file for update_engine am: 1ddc8d15a7

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/1899350

Change-Id: Ib9dbe81e8be00bee3d22561f4fb41624498c837f
diff --git a/OWNERS b/OWNERS
index 938752f..58ecfe1 100644
--- a/OWNERS
+++ b/OWNERS
@@ -5,10 +5,11 @@
 elsk@google.com
 senj@google.com
 xunchang@google.com
+zhangkelvin@google.com
 
 # Chromium OS maintainers:
-ahassani@google.com
 kimjae@google.com
 
+
 # Chromium OS only:
 # COMPONENT: Internals>Installer