GitLab

- Added phone name to the notification and fix the text layout according
to spec.
- Added IDs to access app name and summary text in NotificationViewMD
for customization.

Screenshots:
https://screenshot.googleplex.com/3sbTp3UdCCbmEHZ
https://screenshot.googleplex.com/62qWt4XimsUwMKB
https://screenshot.googleplex.com/5ie8JCirGmYpeS2
https://screenshot.googleplex.com/5KvapXRjX9zBKXP

Bug: 1106937,1126208
Change-Id: I401566ad05e248a724f3665f0c1e4c9d1a7891c5
Fixed: 1147264
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2532041Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Tim Song <tengs@chromium.org>
Commit-Queue: Andre Le <leandre@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826990}