Make "all user" services work when packaged.

services/service_manager/tests/service_manager/embedder_manifest.json

Index: services/service_manager/tests/service_manager/embedder_manifest.json
diff --git a/chrome/test/base/mash_browser_tests_manifest.json b/services/service_manager/tests/service_manager/embedder_manifest.json
similarity index 53%
copy from chrome/test/base/mash_browser_tests_manifest.json
copy to services/service_manager/tests/service_manager/embedder_manifest.json
index 9748dfc2edc2f568fda55896df285270c7b6755d..60128320c4f84a1bd257804c83ed699e161c27a9 100644
--- a/chrome/test/base/mash_browser_tests_manifest.json
+++ b/services/service_manager/tests/service_manager/embedder_manifest.json
@@ -1,15 +1,16 @@
 {
-  "name": "exe:mash_browser_tests",
-  "display_name": "Mash Browser Tests",
+  "name": "exe:service_manager_unittest_embedder",
+  "display_name": "Service Manager Unittest: Embedder",
   "interface_provider_specs": {
     "service_manager:connector": {
       "provides": {
+        "service_manager_unittest:embedder": [ ],
         "service_manager:service_factory": [
           "service_manager::mojom::ServiceFactory"
         ]
       },
       "requires": {
-        "*": [ "app" ]
+        "exe:service_manager_unittest_target": [ ]
       }
     }
   }