[AF USS] Implement AutofillWalletSyncBridge::ApplySyncChanges

Bug: 853688
Change-Id: Ifa83c61a4bf2865379e27945bd1dc7eba1e74fc8
Reviewed-on: https://chromium-review.googlesource.com/1164162
Commit-Queue: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Reviewed-by: Jan Krcal <jkrcal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581713}
12 files changed