TensorFlow Android Native

GitHub Actions build harness for producing Android arm64-v8a TensorFlow Java JNI binaries for the org.tensorflow stack.

Current workflow:

• checks out the historical tensorflow/java baseline closest to the Slay-I mod
• patches it for Android arm64
• builds with Java 11, Bazel, Android SDK, and NDK
• uploads build logs and produced .so files as workflow artifacts

The first runs are expected to be iterative because this source tree predates current Android and Bazel toolchains.