feat(android): 新增 Android/ 目录，为 TraeTools 增加 Android 端 - #52

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-dotnet@v4, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Possible null reference assignment.

Possible null reference assignment.

Possible null reference assignment.