GitLab

Updates the error string shown when adding a printer fails for a
non-descript reson.

Bug: 1011586
Change-Id: I89ef561ad96b60020c0e04cc492bdd5fda738f3b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1874592
Auto-Submit: Bailey Berro <baileyberro@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#708634}