Revert "Migrate MainSwitchBar in Settings to Material3"

Revert submission 25338737-settingslib_main_switch

Reason for revert: breaks packages/modules/AdServices/adservices/apk/tests/settingsgaota/src/com/android/adservices/ui/settingsga/SettingsGaUiAutomatorTest.java (https://android-build.corp.google.com/test_investigate/?invocationId=I66100010216561043&testResultId=TR33729044105357424)

Reverted changes: /q/submissionid:25338737-settingslib_main_switch
Bug: 310546637
Change-Id: I7ab391d97ed5b784818121304ffa5e984bdf65c4