Move metadata in OWNERS files to DIR_METADATA files

Bug: 1113033
Change-Id: I8af15a165e85c149696dd87c448811324c36601b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/364736
Commit-Queue: Edward Lemur <ehmaldonado@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
diff --git a/DIR_METADATA b/DIR_METADATA
new file mode 100644
index 0000000..3d68dcf
--- /dev/null
+++ b/DIR_METADATA
@@ -0,0 +1,3 @@
+monorail {
+  component: "Internals>Skia"
+}