[Sync] Move //components/sync_driver to //components/sync/driver.

This change was generated by the following script:
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The manual changes that get cherry-picked in can be seen in patch set #14.

BUG=626114
TBR=rohitrao,sky,caitkp

Review-Url: https://codereview.chromium.org/2203673002
Cr-Commit-Position: refs/heads/master@{#411904}
430 files changed