chore: add default_version and codeowner_team to .repo-metadata.json (#1547)

Author: parthea

.repo-metadata.json

@@ -1,4 +1,3 @@
-
 {
     "name": "google-api-python-client",
     "name_pretty": "Google API Python Client",
@@ -8,5 +7,7 @@
     "language": "python",
     "library_type": "REST",
     "repo": "googleapis/google-api-python-client",
-    "distribution_name": "google-api-python-client"
-  }
+    "distribution_name": "google-api-python-client",
+    "default_version": "",
+    "codeowner_team": ""
+}