Java instances were leaked each time of debugging `flutter-idea [runIde]` even the process has been exited properly

## Steps to Reproduce

1. Debug with `flutter-idea [runIde]`.
2. After the IDE starts, close it by clicking its exit entry.
3. The corresponding `java` was leaked.

### Additional context

On Windows, each run creates a significant memory-occupied (~1.4G) `java.exe` and it won't get terminated.