Add OWNERS file

Test: manual
Change-Id: Iee5be9d7276722fd52d60a0ebf651bdabec96b83
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..4d9907d
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1 @@
+yim@google.com