fix: cb file does not get picked up by cbpp

Change-Id: I69a45494ecb774cdc26a685a94e86e32372a13c2
Bug: 310994404
Test: make BTPairingTest
diff --git a/tests/automotive/mobly_tests/utilities/crystalball_metrics_utils.py b/tests/automotive/mobly_tests/utilities/crystalball_metrics_utils.py
index 438ff3f..46810f8 100644
--- a/tests/automotive/mobly_tests/utilities/crystalball_metrics_utils.py
+++ b/tests/automotive/mobly_tests/utilities/crystalball_metrics_utils.py
@@ -16,7 +16,9 @@
 import logging
 from typing import Any, Dict
 
-CB_FILENAME = 'crystalball.test_results.txt'
+# Keep consistent with
+# https://g3doc.corp.google.com/wireless/android/test_tools/crystalball/cbpp/README.md
+CB_FILENAME = 'test_results.txt'
 
 
 def export_to_crystalball(data: Dict[str, Any], output_dir: str, test_name: str) -> None: