Migrate SyncEncryptionPassphrase VC.

This CL migrates the SyncEncryptionPassphraseCollectionViewController
and SyncCreatePassphraseCollectionViewController from
SettingsRootCollectionViewController, which is based on
MDCCollectionViewController, to SettingsRootTableViewController, which
is based on UITableViewController.

Bug: 894791
Change-Id: I22f6f6420c5d63e2d3901ae93c8f52fc37b81254
Reviewed-on: https://chromium-review.googlesource.com/c/1382075
Commit-Queue: Yi Su <mrsuyi@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617808}
23 files changed