window_resizer: Add two metrics to track drag to maximize mis-triggers

This CL adds two metrics:
1. Ash.Window.DragMaximized.Valid which tracks the total number of valid
drag to maximize behavior and mis-triggers.
2. Ash.Window.DragMaximized.NumberOfMisTriggers which tracks the number
of mis-triggers of drag to maximize behavior for a window during its
lifetime.
Definition of mis-trigger: A window is dragged to maximized and then
restored within five seconds.

Test: manual, added unit-tests
Fixed: 1309157
Change-Id: Ied944e49b20c8c7d797ec98105ca9bdf6693ffcb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3582463
Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: Connie Xu <conniekxu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#994416}