Tab resume: Fix data collection issues

The platform type needs to be used as input to the model.
The seen events could be recorded too often, so add a sampling option
when collecting training data in case we need it.

Bug: 330577142, 345827681
Change-Id: I59cac3ae14422aece06a35eeeb20c3a65bfcd1f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5609756


Commit-Queue: Siddhartha S <ssid@chromium.org>
Reviewed-by: Xi Han <hanxi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1312900}