Add natsu@ to cuttlefish_vmm owners

Also alphabetize owners.

Test: n/a
Change-Id: If043164a7328caac20466cff254d34f19e9646e2
diff --git a/OWNERS b/OWNERS
index 43c2542..9594320 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,7 +1,8 @@
 adelva@google.com
 ghartman@google.com
 jemoreira@google.com
-schuffelen@google.com
-muntsinger@google.com
 malchev@google.com
+muntsinger@google.com
+natsu@google.com
 rammuthiah@google.com
+schuffelen@google.com