Update expiration date of USB metrics histograms

We are actively using these histograms as part of Peripherals Task
Force.

Bug: b/284318041
Change-Id: Ic1a535f2a49efbbe4454ec304469a9505a12f5c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4566951


Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Commit-Queue: Won Chung <wonchung@google.com>
Cr-Commit-Position: refs/heads/main@{#1149414}