broadband-modem-mbim: update extended signal info on MBIM notifications

We process the MBIM signal state notification and use it to update the
extended signal quality information in the Signal interface.
8 jobs for master in 18 minutes and 53 seconds (queued for 9 seconds)
Status Name Job ID Coverage
  Container Prep
passed build container #14960808

00:00:15

 
  Build
passed build-default-artifacts #14960814

00:18:36

passed build-meson-release #14960815

00:00:50

passed build-no-qmi #14960809

00:04:44

passed build-no-qmi-no-mbim #14960812

00:04:36

passed build-qmi-newest-commands #14960813

00:06:44

passed build-qmi-no-qrtr-no-mbim #14960811

00:05:23

passed build-qmi-qrtr-no-mbim #14960810

00:05:14