Marks Windows_android hot_mode_dev_cycle_win__benchmark to be flaky (#142609)

<!-- meta-tags: To be used by the automation script only, DO NOT MODIFY.
{
  "name": "Windows_android hot_mode_dev_cycle_win__benchmark"
}
-->
Issue link: https://github.com/flutter/flutter/issues/142608

.ci.yaml

@@ -5936,6 +5936,7 @@ targets:
 
   # windows motog4 benchmark
   - name: Windows_android hot_mode_dev_cycle_win__benchmark
+    bringup: true # Flaky https://github.com/flutter/flutter/issues/142608
     recipe: devicelab/devicelab_drone
     presubmit: false
     timeout: 60