[Event Timing] Drop interactionId for events affected by autoscroll

We don't want to record the interaction UKM metrics for all the events
that cause text highlight scroll, but we still measure their input
latency and record them into performance observer. We don't set the
interaction ids for them, so we don't count them into interaction
metrics.

Bug: 330711100
Change-Id: I6f730680a6d4a2a7a19a9dfabfd23c9329f55203
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5719352
Reviewed-by: Robert Flack <flackr@chromium.org>
Reviewed-by: Michal Mocny <mmocny@chromium.org>
Commit-Queue: Lan Wei <lanwei@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1376953}