Merge "Add command to restart the modem" am: 9a4ee9e01e am: 274d595fa8

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1543581

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I61eca88093766fcf8f88970b7cde8ef2c4061040