Android Builds

[gedeondoescode]

• Update Kotlin version to 2.2.20
• Update sd-mobile-core with modern expo-modules API to successfully compile on Android
• added android to build-mobile xtask
• updated CONTRIBUTING.md
• Added openssl-sys to sd-mobile-core as a workaround for native Android builds
• Switched from deprecated @react-native-community/clipboard

[gedeondoescode]

Sorry in advance, Jamie, for this one big commit 🙃

[cursor]

PR Summary

Add Android build support: detect targets, download native deps, build artifacts, and extend config with NDK/env details; also add Android data dir in core config.

• Build/xtask:
  • Detect Android Rust targets and download per-target native deps via download_android_deps.
  • Build sd-mobile-core for aarch64-linux-android and x86_64-linux-android.
  • Gate iOS dependency download/build to macOS only.
• Config generation (xtask/src/config.rs):
  • Add android_ndk_home, host_tag, and has_android to mustache context; derive from ANDROID_NDK/ANDROID_NDK_HOME and host OS/arch.
  • Detect Android targets alongside iOS; include mobile deps path.
• Core config (core/src/config/mod.rs):
  • Add Android-specific data directory using dirs::data_dir().join("spacedrive").

^{Written by Cursor Bugbot for commit 8e4d6d0. Configure here.}

[jamiepine]

This is awesome thank you!