Add sequence checkers/annotations to AddressTrackerLinux

Add locking annotations to AddressTrackerLinux to ensure variables are
only accessed when holding the appropriate lock.

Also convert the ThreadChecker to a SequenceChecker and call it in
various methods.

Bug: 1312226
Change-Id: Iffc5895243126e57d2fda3e14a28eb9034423a28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4425201
Commit-Queue: Matthew Denton <mpdenton@chromium.org>
Code-Coverage: Findit <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: Adam Rice <ricea@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1130367}