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
2 files changed