Migrate SavePasswordsCollectionViewController.

This CL migrates the SavePasswordsCollectionViewController from
CollectionViewController, which is based on MDCCollectionViewController,
to ChromeTableViewController, which is based on UITableViewController.

old version UI:
https://drive.google.com/open?id=1wep_qWxpoFYed6K3k2y2uwN6nJZut5f3
https://drive.google.com/open?id=1n_Vzc5AjlnrmAL5BmaGEuY18kG_3DKL4
https://drive.google.com/open?id=1G3ceF52yDQcg2WDvthP7dIPCy-BND_w1

new version UI:
https://drive.google.com/open?id=1HC33oWDWtgd0V1daf7OYceUo7zj5dB8t
https://drive.google.com/open?id=1P7wi_a47hpWzzB30nzIV9JIu1puwGL8r
https://drive.google.com/open?id=1E1EYLq56jsy9QjSkzqcPTUCdV0XBkeS1

Bug: 894791,751311
Change-Id: I7ae4b244a9eb18d0c4af556ae2ed39da4fec0451
Reviewed-on: https://chromium-review.googlesource.com/c/1361241
Reviewed-by: Eric Noyau <noyau@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Reviewed-by: Chris Lu <thegreenfrog@chromium.org>
Commit-Queue: Yi Su <mrsuyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615861}
18 files changed