Reland: [AF] Test that removing wallet data results in removing metadata

This CL adds two more sync integration tests for autofill wallet sync.
A flakiness issue has been solved since the original CL
(https://chromium-review.googlesource.com/c/1358508) got reverted
(https://chromium-review.googlesource.com/c/1366876).

TBR=sebsg@chromium.org

Bug: 894001
Change-Id: I20a2f7a45bc48f83d7f01e35984f48edf907f055
Reviewed-on: https://chromium-review.googlesource.com/c/1381433
Reviewed-by: Jan Krcal <jkrcal@chromium.org>
Commit-Queue: Jan Krcal <jkrcal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617416}
3 files changed