Require an explicit ServiceName annotation for interfaces in Java

mojo/services/location/interfaces/location_service.mojom

Index: mojo/services/location/interfaces/location_service.mojom
diff --git a/mojo/services/location/interfaces/location_service.mojom b/mojo/services/location/interfaces/location_service.mojom
index ab7a6d8c6a606a3a44e3e610d83cf935372e94ad..da1a85f3f8aa35ce68036a70c9376697f9225602 100644
--- a/mojo/services/location/interfaces/location_service.mojom
+++ b/mojo/services/location/interfaces/location_service.mojom
@@ -13,6 +13,7 @@ import "location/interfaces/location.mojom";
 // Google Play Services Location API. If we ever want to expand this to multiple
 // platforms or if it starts growing in complexity, we should strongly consider
 // use of Chromium's geolocation code.
+[ServiceName="mojo::LocationService"]
 interface LocationService {
   enum UpdatePriority {
     // Use this setting to request location precision to within a city block.