[Android] Use HistogramWatcher in NQETest

Bug: 1412882
Change-Id: I29c42ca237a00885c2e2ccf21869216998404cc9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4321607


Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1115268}