Add rand_chacha/OWNERS am: 4f8fff8eb7 am: 9a98bc1413 am: affa0c121f am: 4e51ca7cec

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/rand_chacha/+/1429107

Change-Id: I800db1672525971116c358fca36e902d0e5b65e2
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..46fc303
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1 @@
+include platform/prebuilts/rust:/OWNERS