Jetpack XR Native Code

These shared libraries are used by the xr:runtime-openxr and xr:scenecore Jetpack modules to expose OpenXR functionality from a C API to Java and Kotlin code.

They are equivalent to builds produced from the open-source Jetpack XR Native code hosted at https://github.com/google-ar/jetpack-xr-natives/.

Imported from https://rapid.corp.google.com/#/candidate/jetpack_xr/jetpack_xr_xru_release/jetpack_xr_xru_release_RC11