Rollback SystemApis for Mainline

Rolling back telephony SystemdApis for mainline.

Bug: 147854704
Bug: 151245675
Test: make
Merged-In: Ief11f574482461a4cda1b4e59cd23aaa0b8b9eef
Change-Id: Ief11f574482461a4cda1b4e59cd23aaa0b8b9eef
3 files changed