chromiumos-assets: Add OWNERS file

This CL is populating OWNERS file based on the candidates in the Chrome OS OWNERS status sheet.

BUG=b:132095048
TEST=None

Change-Id: I90296088638d9dd4ec889d73280201fb1b59f025
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/chromiumos-assets/+/1682780
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..370d243
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,4 @@
+jkwang@chromium.org
+marcheu@chromium.org
+xiyuan@chromium.org
+zelidrag@chromium.org