Revert "Introduce RingtoneSelection for carrying ringtone preference information." This reverts commit ff88e58210b6c3032d7b3096247e99b8e6e7b9cf. Reason for revert: dead code Bug: 301713440 Bug: 272282867 Bug: 323853450 Test: n/a Change-Id: Ie112c3b7cd08f5576792460a282df05acc12f87a