How to include OVR_Mrc_Shim.h in hello_xr for Native Android Mixed Reality Capture?

Native Android Mixed Reality Capture

In the instructions above, it states:

To add OVRMrcLib to your native Android project:

1. Include Shim/OVR_Mrc_Shim.h and Shim/OVR_Mrc_Shim.cpp in your project

Which file in the hello_xr example do I #include Shim/OVR_Mrc_Shim.h? I'm guessing maybe openxr_program.h, but I want to get things right in the first step, since I'm having great difficulties in the next steps.