GitLab

This CL does the following:
- add an <iron-collapse> containing <settings-personalization-options>
in the sync subpage when unified-consent is enabled.
- hide <settings-personalization-options> when unified-consent is enabled,
and instead show description with a link to the sync subpage.

screenshots: https://imgur.com/a/3keIzR3

Bug: 800973, 800975
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I94e0e2abde13c9260f5dbd8a0a444244c556f253
Reviewed-on: https://chromium-review.googlesource.com/1025314
Commit-Queue: Scott Chen <scottchen@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#554598}