[vulkan] Add vulkan_api_test as an instrumentation test (#83978)
This diff adds a `fb_xplat_cxx_test` Android instrumentation test in internal repo that runs `vulkan_api_test.cpp`. Some small changes to `vulkan_api_test.cpp` were needed to build/run the binary successfully.
Differential Revision: [D38954229](https://our.internmc.facebook.com/intern/diff/D38954229/)
**NOTE FOR REVIEWERS**: This PR has internal Facebook specific changes or comments, please review them on [Phabricator](https://our.internmc.facebook.com/intern/diff/D38954229/)!
Pull Request resolved: https://github.com/pytorch/pytorch/pull/83978
Approved by: https://github.com/kirklandsign
