Fix should not let users adjust a11y button settings in SuW issue

Root Cause: Users should not be able to adjust any settings of the a11y
button in the setup wizard flow, but there will be a link button to
a11y button settings page on the a11y tutorial dialog where user can
modify the settings.

Solution: Hide the link button in a11y tutorial dialog if we know the
dialog is launched from any setup wizard page.

Bug: 256084341
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AccessibilityGestureNavigationTutorialTest
Change-Id: I742f9b7ba311fcd7a5105463709dc104345b9f12