chore: add library type to .repo-metadata.json (#59)

Author: parthea

packages/google-analytics-admin/.repo-metadata.json

@@ -6,6 +6,7 @@
     "issue_tracker": "https://issuetracker.google.com/issues?q=componentid:187400",
     "release_level": "alpha",
     "language": "python",
+    "library_type": "GAPIC_AUTO",
     "repo": "googleapis/python-analytics-admin",
     "distribution_name": "google-analytics-admin",
     "api_id": "analyticsadmin.googleapis.com"