Require an explicit ServiceName annotation for interfaces in Java

services/sharing_sink/sharing_sink.mojom

Index: services/sharing_sink/sharing_sink.mojom
diff --git a/services/sharing_sink/sharing_sink.mojom b/services/sharing_sink/sharing_sink.mojom
index 28b221abd72039f285df156d2502506e6e2b12d9..6128f112bc0ce65742d5a3912d16117ce23f95f3 100644
--- a/services/sharing_sink/sharing_sink.mojom
+++ b/services/sharing_sink/sharing_sink.mojom
@@ -8,6 +8,7 @@ module sharing_sink;
 // Private interface for the shell. When the shell connects to the sharing
 // service this interface will be returned which can be used to send shareable
 // data to registered apps.
+[ServiceName="sharing_sink::SharingSink"]
 interface SharingSink {
   OnTextShared(string data);
 };