Apply SettingsPreferenceTheme in Settings

- Set all of preference style inherit from SettingsPreferenceTheme
- Apply to Theme.Settings and Theme.Settings.Home
- Fix robotest failed in ScreenTimeoutSettingsTest

Bug: 185206291
Test: manual & robotest
Change-Id: I855d003b10348569903855fcbf235bc00265658b
(cherry picked from commit 817a167416eecfa6f6455e94f31ffc9ff59ea0a4)
6 files changed