Mark `Windows_android hot_mode_dev_cycle_win__benchmark` as no longer flaky (#143016)

Marked flaky in flutter/flutter#142609

Per the reasons I discuss in [this comment](https://github.com/flutter/flutter/issues/142608#issuecomment-1930868003) on the corresponding issue, I believe this test is probably not actually flaky.

Fixes https://github.com/flutter/flutter/issues/142608

.ci.yaml

@@ -5927,7 +5927,6 @@ 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