Move mojo\shell to services\shell

services/shell/tests/connect/connect_test_app_manifest.json

 {
   "manifest_version": 1,
   "name": "mojo:connect_test_app",
   "display_name": "Connect Test App",
   "capabilities": {
     "required": {
       "mojo:connect_test_a": { "interfaces": ["*"] },
       "mojo:connect_test_class_app": {
         "classes": [ "class" ],
         "interfaces": ["mojo::shell::test::mojom::ConnectTestService"]
       },
       "mojo:shell": { "classes": [ "user_id" ] }
     }
   }
 }