Attempt to fix the build

This CL attempts to fix clean builds by adding a missing dependency from
service_registry to service_provider.

Also, I've attempted to fix the sky tests by updating the reference to
service_registry.mojom.dart.

TBR=hansmuller@chromium.org

Review URL: https://codereview.chromium.org/968553002

framework/embedder.dart

@@ -8,7 +8,7 @@ import "mojo:bindings" as bindings;
 import "mojo:core" as core;
 import "package:mojo/public/interfaces/application/service_provider.mojom.dart";
 import "package:mojo/public/interfaces/application/shell.mojom.dart";
-import "package:services/service_registry/service_registry.mojom.dart";
+import "package:mojo/services/service_registry/public/interfaces/service_registry.mojom.dart";
 
 final _EmbedderImpl embedder = new _EmbedderImpl();
 
@@ -56,5 +56,3 @@ class _EmbedderImpl {
     return _serviceRegistry;
   }
 }
-
-