Android Support (#166)

1. Add vpnservice tauri plugin for android.
2. add workflow for android.
3. Easytier Core support android, allow set tun fd.

tauri-plugin-vpnservice/tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "target": "es2021",
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "skipLibCheck": true,
+    "strict": true,
+    "noUnusedLocals": true,
+    "noImplicitAny": true,
+    "noEmit": true
+  },
+  "include": ["guest-js/*.ts"],
+  "exclude": ["dist-js", "node_modules"]
+}