Remove batterySaverScheduleProvide checking from BatterySaverUtils

Rset the save schedule mode into none directly if the current mode is
routine, since the 'schedule by routine' is removed from saver setting

Bug: 258603978
Test: make RunSettingsLibRoboTests -j40
Change-Id: I261737e5c0ae23ceac7bd4b1b8d45526a60b2899