Add OWNERS in device/google/dragon/recovery

* Owners are selected from top CL approvals or owners.
  They will be suggested to review/approve future CLs.
* OWNERS files are recognized by the new find-owners plugin, see .md files in
  https://gerrit.googlesource.com/plugins/find-owners/+/master/src/main/resources/Documentation/

Test: build/make/tools/checkowners.py -c -v OWNERS
Change-Id: I2aed03eb95ab434b34cd21b74548706a828f65dc
diff --git a/recovery/OWNERS b/recovery/OWNERS
new file mode 100644
index 0000000..9f6ef9e
--- /dev/null
+++ b/recovery/OWNERS
@@ -0,0 +1,3 @@
+set noparent
+tbao@google.com
+xunchang@google.com