WM Metrics: Add test for WindowSizeRange

Test that window size range can be recorded properly.

Bug: b/326636295
Change-Id: I4fe0c1268910a5030c664321d00ad64121fe79bd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5325592


Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Commit-Queue: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1280270e}