Refactor: Move hearing device spinner related codes into SettingsLib

Settings now use the same spinner UI as in hearing device dialog, so
moving the common PresetSpinner and HearingDevicesSpinnerAdapter from
SystemUI to SettingsLib to prevent duplicated codes.

Flag: EXEMPT simple refactor
Bug: 417628947
Test: m
Test: atest PresetSpinnerTest
Test: atest PresetLayoutTest
Change-Id: Ib4ed6c866883b5c9221c3e1123034905aa0d03d7