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This CL adds support for a new state in the notification access opt-in
flow which displays an error when notification access is prohibited due
to a work profile on the user's phone.

This new state (NOTIFICATION_ACCESS_PROHIBITED) is not actually passed
to the settings app yet, but a follow-up CL provides this value when
appropriate.

Screenshot:
http://go/chrome-ss/2d53bf170afdbdbcc73d341c1e2fe774bfa30391

Bug: 1155151, 1106937
Change-Id: I00e852fc7b7c4281340fe7c8d02bcc6619f8862c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2573887
Commit-Queue: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Jimmy Gong <jimmyxgong@chromium.org>
Cr-Commit-Position: refs/heads/master@{#834049}