Add advanced targeting to exclude desktop users with 0 pinned tabs

[sfoster]

To support the ongoing vertical and pinned tabs feature development, we want to be able to target users who have not pinned any tabs in any of their currently open windows

Experiment brief: https://docs.google.com/document/d/1awOsMw8l3h2b-VcwAfncR_8kFrzGHZrNDq3jezUNUQA/edit?tab=t.0

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