UPSTREAM: iface-modem-3gpp: cleanup packet service state on disabling

Otherwise the state cached by the protocol implementation will be
different to the one exposed in the 3GPP interface.

(cherry picked from commit 614cc3e4670c5060ad3454ed1d26501907af02d9)

BUG=b:284133306
TEST=tast --verbose run ${DUT} cellular.ShillCellularSuspendResumeAutoconnect.enabled

Change-Id: Icf9e04be0c50326adee1553d166caee531c7a609
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/modemmanager-next/+/4565436
Tested-by: Aleksander Morgado <aleksandermj@google.com>
Reviewed-by: Eric Caruso <ejcaruso@chromium.org>
Commit-Queue: Aleksander Morgado <aleksandermj@google.com>
1 file changed