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This CL updates NTP strings for ephemeral guest profile by adding
educational bullet points about items that will not be saved
on the device vs. items that will be saved.

Screenshot:
https://screenshot.googleplex.com/7Gf3vSb5iAWBHxt.png

Bug: 1134111
Change-Id: I7096631987dcc143552c2c721ed1ca4868265987
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2442690
Commit-Queue: Mariam Ali <alimariam@google.com>
Reviewed-by: Evan Stade <estade@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Reviewed-by: Esmael Elmoslimany <aee@chromium.org>
Reviewed-by: Rohit Agarwal <roagarwal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822576}