Add silence support to CallScreeningService/Call API

Test: CTS
Test: Unit Tests
Test: Manual
Bug: 126590377
Bug: 122671585

Change-Id: I4e7c67784198678eef1926759ec1d8afb98438f4
Merged-In: I4e7c67784198678eef1926759ec1d8afb98438f4
4 files changed