Add OWNERS file

Change-Id: I13315585ecc74978689d0e033ce93a94b1560d1d
Exempted-From-Owner-Approval: Vacation
diff --git a/property_service/OWNERS b/property_service/OWNERS
new file mode 100644
index 0000000..babbe4d
--- /dev/null
+++ b/property_service/OWNERS
@@ -0,0 +1 @@
+tomcherry@google.com