[CrOS cellular] Add error message to remove eSim profile dialog

- Before this CL remove eSIM profile dialog, did not display any
  meaningful error if remove fails, this CL adds a meaningful error.

Screenshot: https://screenshot.googleplex.com/5JVxg2tdsLued8o.png

Bug: 1154787
Change-Id: Iee30704914ba582325ea9314e7a1a62736f778ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2602511


Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Azeem Arshad <azeemarshad@chromium.org>
Commit-Queue: Nnamdi Theodore Johnson-kanu <tjohnsonkanu@google.com>
Cr-Commit-Position: refs/heads/master@{#839500}