Replaces the 5 per-run tool-install steps (~2m 30s) with a pre-built
container image (git.aleshym.co/funman300/android-builder) that ships
Ubuntu 22.04 + Java 17 + Android SDK/NDK + Rust stable + aarch64 target
+ cargo-ndk + sccache. android-release.yml now runs inside the container
and adds two cache steps instead: Cargo registry and sccache directory.
sccache (RUSTC_WRAPPER) caches at the translation-unit level so partial
hits survive Cargo.lock changes — far more resilient than caching the
full target/ directory.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
funman300