This is adding in the new Windows 11 only version of taskbar pinning. For the new pinning to work, we need to use limited access feature tokens. Those are going to be made private and aren't included with this change.
This change will compile, and will work if built against the correct limited access feature tokens, as specified in developer local machine config files, but for every other build, the new taskbar pinning won't work and will fall back to the old methods.
I will implement the try / release building machines using the secret limited access feature tokens in a follow-up diff.
Differential Revision: https://phabricator.services.mozilla.com/D205004
4a6f7586b4