Merge "Basic support for device to device communication." am: 280bc375f3 am: 68032542c9 am: 870a5644c6

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1548883

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic1a4bae367766da6bda0c3e335723f56c1d58fd6