Use code() instead of to_abi() on hresult_error structs as the latter
has additional side effects. Cast all values to int32_t to ensure the
hresult int32_t() operator is called so we pass the actual value and not
the full struct (detected by PVS Studio).
Functionality is coming in a future Windows update to disable the yellow
border when using WGC. Add code now to opt in. Will require SDK upgrade
later for OBS build.
winrt::apartment_type::multi_threaded is necessary to dodge assert for
calling get() on RequestAccessAsync result. Don't think I will ever
fully understand COM apartments.
