Android Support

[timzaak]

• flutter Android startup
• Android export plugin API to Flutter
• Android VPN Builder api Kotlin, interact with Rust by Dart
• Flutter UI, PC and Mobile has different app.dart
• cicd to release apk

Refact

• refact api command to api client
• add Android log layer for Tracing
• dart call Kotlin with MethodChannel
• refactor tun init for Android
• refactor unix socket of server api to call function/tcp
• refactor server init

Feature

• join network(QRCode、Keycloak)
• list network
• network link can start or stop without remove