Merge branch 'add_licenses' into 'main'

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## Resources

For further information about Arti and Android, please see the [Arti documentation](https://gitlab.torproject.org/tpo/core/arti/-/blob/main/doc/Android.md)

## License

This code is licensed under either of

 * [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0)

 * [MIT license](https://opensource.org/licenses/MIT)

at your option.

## Contribution

Unless you explicitly state otherwise, any contribution intentionally

submitted for inclusion in the work by you, as defined in the Apache-2.0

license, shall be dual licensed as above, without any additional terms or

conditions.