Reland "CHROMIUM: mm-iface-modem-3gpp: test for error presence explicitly"

This reverts commit cb6bd5570c628d70db18bbbae4e0cb8851205280.

Change-Id: I6e8fea65cb571c555de62e83f9ca603992fb6d21
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/modemmanager-next/+/2203103
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: Eric Caruso <ejcaruso@chromium.org>
Tested-by: Eric Caruso <ejcaruso@chromium.org>
1 file changed