* move ndk code to a new library * add gradle file
This reverts commit efc8f767c8c8c749a245dd96ad4e2f37c164b54c.
* Introduce starter project for Android Based on examples/llama.swiftui. * Add github workflow * Set NDK version * Only build arm64-v8a in CI * Sync bench code * Rename CI prop to skip-armeabi-v7a * Remove unused tests