Ensure android NDK is installed regardless of runner

This fixes the workflow on runner images where the NDK is not
installed. It bundles together a few other changes.

* Always run gha-setup-vsdevenv even if runners.os != 'Windows'
  * It provides us with the path to CMake
* Switch to nttdl/setup-ndk to install the Android NDK.

Co-authored-by: kendal <[email protected]>

Author: kendalharland