Cannot attach debugger

## Steps to Reproduce

I've already opened a issue on Flutter GitHub but they weren't very useful.
When I try to lauch my application in debug mode, it seems like lauching normally. The applicaion skips all the breakpoints without any error and the application doesn't wait for debugger.

## Version info
Flutter doctor:
```
[√] Flutter (Channel beta, v0.10.2, on Microsoft Windows [Versione 10.0.17134.345], locale it-IT)
• Flutter version 0.10.2 at C:\flutter
• Framework revision d8cbb80206 (2 weeks ago), 2018-10-26 01:30:21 -0400
• Engine revision 6c2ade9fa2
• Dart version 2.1.0-dev.8.0.flutter-bf26f760b1

[√] Android toolchain - develop for Android devices (Android SDK 28.0.3)
• Android SDK at C:\Users\strez\AppData\Local\Android\sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.3
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
• All Android licenses accepted.

[√] Android Studio (version 3.2)
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin version 30.0.1
• Dart plugin version 181.5656
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[√] VS Code (version 1.28.2)
• VS Code at C:\Users\strez\AppData\Local\Programs\Microsoft VS Code
• Flutter extension version 2.20.0

[√] Connected device (1 available)
• ONEPLUS A6003 • a5e445e6 • android-arm64 • Android 9 (API 28)
```

Also Flutter Plugin version: 30.0.1