Asset drop.

- this syncs up the UX repo with the developer repo so that the assets
now match. We should be able to do wholesale drops/diffs from now on.
- lots of changes to widget so that it is (mostly) up to spec now, and
matches the preview

Bug: 5225385
Bug: 5205578
Bug: 4320895
Change-Id: I8ccbadcfc17cdb406599497edc91165809f55d68
349 files changed