Merge "Do not process messages until new messages are feeding" am: 8cb9c78a4d am: 5a9be44e0a

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1535591

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I08c4a4edb8cf5b7ae9d65084000cc368865280f2