Add styles and attributes in SettingsLib

- Add TextAppearance.PreferenceSummary.SettingsLib.
- Update TextAppearance.PreferenceTitle.SettingsLib.
- Update TextAppearance.CategoryTitle.SettingsLib.
- Add settingslib_listPreferredItemPaddingStart.

Fixes: 208402146
Test: manual test
Change-Id: Iccaef4946634befcc254d18be9bb7bbc5b5c1cb8