Package the Rust mobile core and generated Kotlin API for Android (#92)

crates/android/src/lib.rs

@@ -0,0 +1,6 @@
+#![forbid(unsafe_code)]
+
+//! Android packaging of the existing mobile UniFFI component.
+//! The shared component owns every conversion; no interface is copied here.
+
+ironstorage_apple::uniffi_reexport_scaffolding!();