Put the analytics UI behind a flag.

pkg/telemetry/lib/telemetry.dart

Index: pkg/telemetry/lib/telemetry.dart
diff --git a/pkg/telemetry/lib/telemetry.dart b/pkg/telemetry/lib/telemetry.dart
index 99ce8c3323da9ff317fa61d2497bfb8282990774..7b05ec13cbeb55f730752336422fc1344c5744fb 100644
--- a/pkg/telemetry/lib/telemetry.dart
+++ b/pkg/telemetry/lib/telemetry.dart
@@ -16,6 +16,9 @@ export 'package:usage/usage.dart' show Analytics;
 // TODO(devoncarew): Hard-coded to off for now. Remove when we're ready to ship.
 final bool _HARD_CODE_OFF = true;
 
+// TODO(devoncarew): Don't show the UI until we're ready to ship.
+final bool SHOW_ANALYTICS_UI = false;
+
 final String _dartDirectoryName = '.dart';
 final String _settingsFileName = 'analytics.json';