pytorch

52a2adb3 - [android] test_app example linking to pytorch_android aar content (#39587)

[android] test_app example linking to pytorch_android aar content (#39587) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/39587 Example of using direct linking to pytorch_jni library from aar and updating android/README.md with the tutorial how to do it. Adding `nativeBuild` dimension to `test_app`, using direct aar dependencies, as headers packaging is not landed yet, excluding `nativeBuild` from building by default for CI. Additional change to `scripts/build_pytorch_android.sh`: Skipping clean task here as android gradle plugin 3.3.2 exteralNativeBuild has problems with it when abiFilters are specified. Will be returned back in the following diffs with upgrading of gradle and android gradle plugin versions. Test Plan: Imported from OSS Differential Revision: D22118945 Pulled By: IvanKobzarev fbshipit-source-id: 31c54b49b1f262cbe5f540461d3406f74851db6c