C#: Fix exporting for Android

[scgm0]

You should now be able to compile the C# Android export template properly and export C# Android within the editor.
Only tested the Android export for a small project and it's not clear if this causes any other issues.

[raulsntos]

Hey 👋 Thanks for contributing to the .NET module.

Since this is your first time contributing, make sure you've read CONTRIBUTING.md. You'll have to squash all the commits into one, take a look at the PR workflow documentation for more information. Also, feel free to reach out on Rocket Chat if you need help.

[scgm0]

Hey wave Thanks for contributing to the .NET module.嘿 wave 感谢您对 .NET 模块的贡献。

Since this is your first time contributing, make sure you've read CONTRIBUTING.md. You'll have to squash all the commits into one, take a look at the PR workflow documentation for more information. Also, feel free to reach out on Rocket Chat if you need help.由于这是您第一次贡献，请确保您已阅读 CONTRIBUTING.md。您必须将所有提交压缩为一个，请查看 PR 工作流程文档以获取更多信息。另外，如果您需要帮助，请随时通过 Rocket Chat 联系。

Hey wave Thanks for contributing to the .NET module.嘿 wave 感谢您对 .NET 模块的贡献。

Since this is your first time contributing, make sure you've read CONTRIBUTING.md. You'll have to squash all the commits into one, take a look at the PR workflow documentation for more information. Also, feel free to reach out on Rocket Chat if you need help.由于这是您第一次贡献，请确保您已阅读 CONTRIBUTING.md。您必须将所有提交压缩为一个，请查看 PR 工作流程文档以获取更多信息。另外，如果您需要帮助，请随时通过 Rocket Chat 联系。

Hey wave Thanks for contributing to the .NET module.

Since this is your first time contributing, make sure you've read CONTRIBUTING.md. You'll have to squash all the commits into one, take a look at the PR workflow documentation for more information. Also, feel free to reach out on Rocket Chat if you need help.

Thanks, any more questions now?

[raulsntos]

Looks good to me, thanks!

[akien-mga]

Thanks! And congrats for your first merged Godot contribution 🎉