Android 4.4.2 connection refused

Hi,

I try to run my ionic app on a android mobile having Android 4.4.2
When I run the app (ionic cordova run android) I have "ERR_CONNECTION_REFUSED"

I have seen this article https://ionic.zone/debug/ionic-and-android-4
But I also read that the last version of cordova-plugin-ionic-webview@2.2.0 is supposed to give back support for Android kitkat

Could you confirm and help me ?

Thanks

My conf

```
ionic cordova plugin ls
> cordova plugin ls
cordova-android-firebase-gradle-release 1.0.2 "cordova-android-firebase-gradle-release"
cordova-android-play-services-gradle-release 1.4.3 "cordova-android-play-services-gradle-release"
cordova-plugin-compat 1.2.0 "Compat"
cordova-plugin-device 2.0.2 "Device"
cordova-plugin-firebase 2.0.2 "Google Firebase Plugin"
cordova-plugin-geolocation 2.4.3 "Geolocation"
cordova-plugin-ionic-keyboard 2.0.5 "cordova-plugin-ionic-keyboard"
cordova-plugin-ionic-webview 2.2.0 "cordova-plugin-ionic-webview"
cordova-plugin-splashscreen 5.0.2 "Splashscreen"
cordova-plugin-statusbar 2.4.2 "StatusBar"
cordova-plugin-whitelist 1.3.3 "Whitelist"
cordova-support-google-services 1.2.1 "cordova-support-google-services"
phonegap-plugin-multidex 1.0.0 "Multidex"
```

```
node --version
v6.11.0
```

```
npm --version
3.10.10
```

```
ionic --version
4.1.2
```