[AF] Log more info to debug rare flakiness in sync integration tests

CL to be reverted once the investigation is over.

Bug: 911953
Change-Id: Ie76891b6cb140b6a1244e17e12f2884310669484
Reviewed-on: https://chromium-review.googlesource.com/c/1373846
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Commit-Queue: Jan Krcal <jkrcal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616234}
1 file changed