Add myself as an owner of the map files doc.

Bug: None
Test: None
Change-Id: I4ca8a28235295f1cf3c3a40ee1e61d9e36791bd3
diff --git a/docs/OWNERS b/docs/OWNERS
new file mode 100644
index 0000000..776beca
--- /dev/null
+++ b/docs/OWNERS
@@ -0,0 +1 @@
+per-file map_files.md = danalbert@google.com