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This change introduces a notification that is displayed when a user
plugs in a USB printer that is saved to their profile, notifying the
user that the printer has been plugged in.

Bug: 951139
Change-Id: I679e8d19f5bacc94e96a10588c792e307259d7f5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1594802Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660941}