Add mojom module suffix in .mojom files for components/filesystem.

services/catalog/manifest.json

Index: services/catalog/manifest.json
diff --git a/services/catalog/manifest.json b/services/catalog/manifest.json
index fb304dc2d6ac08046864e4191344f8b6c5727f75..3f89a0f359d8ef7989852fce09554d152a5a0f6c 100644
--- a/services/catalog/manifest.json
+++ b/services/catalog/manifest.json
@@ -7,7 +7,7 @@
     // by this service must be stated in code in shell.cc as this manifest is
     // not resolved until after several connections have been made.
     "provided": {
-      "app": [ "filesystem::Directory" ]
+      "app": [ "filesystem::mojom::Directory" ]
     },
     "required": {
       "mojo:shell": { "classes": [ "shell:all_users", "shell:explicit_class" ] }