Optionally send tools download telemetry

Author: angelapwen

lib/init-action.js

@@ -118,13 +118,17 @@ async function sendInitStatusReport(
     workflow_languages: workflowLanguages || "",
   };
 
-  let initToolsDownloadFields: InitToolsDownloadFields = {};
+  const initToolsDownloadFields: InitToolsDownloadFields = {};
 
   if (toolsSource === ToolsSource.Download) {
-    initToolsDownloadFields = {
-      tools_download_duration_ms: toolsDownloadDurationMs,
-      tools_feature_flags_valid: toolsFeatureFlagsValid,
-    };
+    if (toolsDownloadDurationMs !== undefined) {
+      initToolsDownloadFields.tools_download_duration_ms =
+        toolsDownloadDurationMs;
+    }
+    if (toolsFeatureFlagsValid !== undefined) {
+      initToolsDownloadFields.tools_feature_flags_valid =
+        toolsFeatureFlagsValid;
+    }
   }
 
   if (config !== undefined) {