Track the seen objects in Set WebDriver Classic serialization

Tolerate overriding of `Array.prototype.includes`.

When serializing WebDriver Classic script execution result, track the seen objects in Set.
[Validate-Test-Flakiness is being explicitly set to "skip" because of
https://crbug.com/40096995]

Validate-Test-Flakiness: skip
Bug: 357472850
Change-Id: Ic752feb87873f2233eb9f8d8b27cabd36ac6ad71
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5765833
Reviewed-by: Alex Rudenko <alexrudenko@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Alex Rudenko <alexrudenko@chromium.org>
Reviewed-by: Maksim Sadym <sadym@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1338384}