An Android library module wrapping the timer library's native ABI behind an
idiomatic Kotlin `TimerNode` class via a JNI shim. `build-libs.sh` cross-compiles
two native libraries per ABI (arm64-v8a + x86_64) into src/main/jniLibs/:
libmy_timer.so (the Nim library) and libmy_timer_jni.so (the JNI bridge, which
NEEDs the former). The shim turns each Kotlin `external fun` into a blocking call
and reads the typed EchoResponse struct out of the result callback.
Gradle packages everything under jniLibs/ automatically; an instrumented test
covers create/version/echo on a device/emulator. Native build validated for
both ABIs (correct aarch64/x86_64 ELF, JNI symbols exported, libmy_timer.so
linked).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
