Ref to the bug, s2s and talkback pages' footer content descriptions are
prefixed with "About XXX" for talkbalk info announcement. Therefore, for
auto brightness detail page in SUW, we also prefix "About adaptive
brightness" to the footer preference content description, to improve
the consistency with other accessiblity feature suw pages.
Bug: 347859318
Flag: com.android.settings.accessibility.add_brightness_settings_in_suw
Test: manually
atest AutoBrightnessPreferenceFragmentForSetupWizardTest
Change-Id: Ieda4bcffb4f4e11ea68c961beee5c2fff1b29f2c
e8288512ee