Revert^2 "stack::btm get_btm_client_interface().sco.BTM_WriteVoiceSettings"

This reverts commit d96a2f56.

Bug: 350736859
Bug: 349684097
Test: m .
Flag: EXEMPT, Mechanical Refactor

Reason for revert: Should not cause jank

Change-Id: I7095971a47a7c4acde03979bf1fc55c582925c59