feat(android): libbox 隧道重写对接真实 1.13.12 API,APK 编译通过(Task 5)

原生层照 PoC 旧/想象 API 写,与真实 sing-box 1.13.12 libbox 差距是架构级:

- 包名 libbox(非 go.libbox);无 BoxService,改 Libbox.setup + CommandServer 模型

- PangolinVpnService 重写:实现完整 PlatformInterface(15法)+CommandServerHandler

- 新增 DefaultNetworkMonitor(上报默认接口,缺则报 no available network)

- openTun 适配真实 TunOptions(RoutePrefixIterator/getMTU/StringBox DNS)

- 统计/切节点经 CommandClient(uplinkTotal/selectOutbound);MainActivity 接线

构建环境矩阵打通:Gradle 8.7(Java21)+声明式插件迁移+AGP 8.6+Kotlin 2.2.0+占位图标

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

client/android/settings.gradle

@@ -1,11 +1,25 @@
-include ':app'
+pluginManagement {
+    def flutterSdkPath = {
+        def properties = new Properties()
+        file("local.properties").withInputStream { properties.load(it) }
+        def flutterSdkPath = properties.getProperty("flutter.sdk")
+        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+        return flutterSdkPath
+    }()
 
-def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
-def properties = new Properties()
+    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
 
-assert localPropertiesFile.exists()
-localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
 
-def flutterSdkPath = properties.getProperty("flutter.sdk")
-assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
-apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"
+plugins {
+    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
+    id "com.android.application" version "8.6.0" apply false
+    id "org.jetbrains.kotlin.android" version "2.2.0" apply false
+}
+
+include ":app"