Add cwren to libmetricslogger OWNERS

Bug: 69978775
Test: None.
Change-Id: Ic48e37fa4a1fa192bcd948954dc056219535e0b8
diff --git a/libmetricslogger/OWNERS b/libmetricslogger/OWNERS
index 7fe0443..6a6fba2 100644
--- a/libmetricslogger/OWNERS
+++ b/libmetricslogger/OWNERS
@@ -1 +1,2 @@
+cwren@google.com
 jhawkins@google.com