Add default active developers into OWNERS

Bug: 33166666
Test: gerrit uploader
Change-Id: If59f98ccb12581b2663ac33227169c6c766feca6
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..c03b377
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,5 @@
+# Default owners are top 3 or more active recent developers
+# or people with more than 10 commits last year.
+# Please update this list if you find better owner candidates.
+# manuelroman@google.com
+jsimmons@google.com