GitLab

Changes in this CL:
- Update strings to match
- Add main icon to match
- Center text instead of align left

See screenshot in bug.

Remaining work:
- Get list of apps from loadtime data
- Update skip/next labels

Bug: 874118
Change-Id: I11aa47ca4b819ba77b50eef994983ddc72a7028e
Reviewed-on: https://chromium-review.googlesource.com/c/1247422Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Hector Carmona <hcarmona@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596781}