Add OWNERS in external/dng_sdk
am: 4cafaba232

Change-Id: I1faa761be354a5bef6e4d18957fc8364b33ebfa7
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..b49c3c2
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,2 @@
+adaubert@google.com
+zalman@google.com