Revert "Add the core assisted dialing logic to telephony."

This reverts commit c712d4b596fc1219e119880d74164b2ef17a5245.

Reason for revert: we're cutting the feature from P

Change-Id: Ibc237e933f4b698a715fe73567f02d6484e3a4b9
Bug: 73727182
25 files changed