Mobile integration

Hi there!

I'm starting to look at ways we could integrate a BIP157/158 client into Android applications (or just mobile in general), and wondered if you have any resources/docs on that somewhere. Has anyone tried it in a sample app, or do you know how you'd like to go about it? I see an open issue about an FFI layer (#14), but wondering if know of any other information you could point me to.

I'm one of the maintainers for [bdk-ffi](https://github.com/bitcoindevkit/bdk-ffi) and [bdk-android](https://github.com/bitcoindevkit/bdk-kotlin), and I maintain a sample Android app that showcases how to use the Bitcoin Development Kit (the [Devkit Wallet](https://github.com/thunderbiscuit/devkit-wallet)). The wallet currently uses Electrum for its chain data, but I'd love to enable Neutrino-like client capabilities.

Related to this is the fact that the BDK library is looking at enabling using Neutrino clients for its blockchain data, and I'd like to help test/implement that using Nakamoto on Android.

Cheers!