Rename mojo: to service:

services/shell/tests/connect/connect_unittests_manifest.json

 {
   "manifest_version": 1,
-  "name": "mojo:connect_unittests",
+  "name": "service:connect_unittests",
   "display_name": "Connect Unittests",
   "capabilities": {
     "required": {
-      "mojo:connect_test_package": {
+      "service:connect_test_package": {
         "interfaces": [ "shell::test::mojom::ConnectTestService" ]
       },
-      "mojo:connect_test_app": {
+      "service:connect_test_app": {
         "interfaces": [
           "shell::test::mojom::ConnectTestService",
           "shell::test::mojom::StandaloneApp",
           "shell::test::mojom::UserIdTest"
         ]
       },
       "exe:connect_test_driver": {
         "interfaces":  [ "shell::test::mojom::ClientProcessTest" ]
       },
-      "mojo:connect_test_a": {
+      "service:connect_test_a": {
         "interfaces": [
           "shell::test::mojom::ConnectTestService",
           "shell::test::mojom::StandaloneApp",
           "shell::test::mojom::UserIdTest"
         ]
       },
-      "mojo:shell": { "classes": [ "shell:instance_name", "shell:user_id" ] }
+      "service:shell": { "classes": [ "shell:instance_name", "shell:user_id" ] }
     }
   }
 }