starting emulators opens a java window that isn't directly controlled by emulators

### [REQUIRED] Environment info

**firebase-tools:** 9.21.0
``` bash
java 17.0.1 2021-10-19 LTS
Java(TM) SE Runtime Environment (build 17.0.1+12-LTS-39)
Java HotSpot(TM) 64-Bit Server VM (build 17.0.1+12-LTS-39, mixed mode, sharing)
```

**Platform:** Windows 11

### [REQUIRED] Test case

want to start emulators

### [REQUIRED] Steps to reproduce

start emulators
see java window open
stop emulators
see java window remain open
re-start emulators
see error about ports in use

### [REQUIRED] Expected behavior

emulators can be run without spawning java window

### [REQUIRED] Actual behavior

emulators run and spawn java window but don't have control over the process

Video showing behavior:
https://www.loom.com/share/bc86030a8e224f70a740e4e0d89d5598