Release 2.3.0: Android APK with subscription, ping and Xray/Hy2 VPN.

Co-authored-by: Cursor <cursoragent@cursor.com>

build-android.bat

@@ -0,0 +1,41 @@
+@echo off
+setlocal
+cd /d "%~dp0"
+
+set "JAVA_HOME=C:\Program Files\Microsoft\jdk-17.0.20.8-hotspot"
+set "ANDROID_HOME=%LOCALAPPDATA%\Android\Sdk"
+set "ANDROID_SDK_ROOT=%ANDROID_HOME%"
+set "PATH=%JAVA_HOME%\bin;%ANDROID_HOME%\cmdline-tools\latest\bin;%ANDROID_HOME%\platform-tools;%PATH%"
+
+if not exist "%ANDROID_HOME%\platforms\android-35" (
+  echo Android SDK platform android-35 missing. Run sdkmanager first.
+  exit /b 1
+)
+
+echo sdk.dir=%ANDROID_HOME:\=\\%> android\local.properties
+
+echo Fetching protocol cores into assets...
+powershell -ExecutionPolicy Bypass -File scripts\fetch-android-cores.ps1
+if errorlevel 1 exit /b 1
+
+cd android
+if not exist gradlew.bat (
+  echo Generating Gradle wrapper...
+  where gradle >nul 2>&1
+  if errorlevel 1 (
+    echo Download gradle wrapper via powershell...
+    powershell -ExecutionPolicy Bypass -File ..\scripts\bootstrap-gradle.ps1
+  ) else (
+    gradle wrapper --gradle-version 8.9
+  )
+)
+
+call gradlew.bat assembleDebug
+if errorlevel 1 exit /b 1
+
+cd ..
+mkdir dist\navis-release\android 2>nul
+copy /Y android\app\build\outputs\apk\debug\app-debug.apk dist\navis-release\android\Navis.apk
+echo.
+echo APK: dist\navis-release\android\Navis.apk
+endlocal