(1/n) Fix Wrong button color in lockscreen dialog.

Use SUW API ThemeHelper.shouldApplyGlifExpressiveStyle() to update
AlertDialog style.

Flag: EXEMPT use SUW Expressive style API to check

Bug: 390544548

Test: atest SetupSkipDialogTest
Test: build and manually check the UI and its behaviors
Change-Id: I953270f4dc38796c3b64cba8cc3e84c3f4dcc2f2