Update Preference style

- Set Title/Summary left alignment
- Update FooterPreference layout
- Set Title font size to 20sp
- Adjust preferenceCategory TextAppearence
- Adjust ListItemPaddingStart and End
- Move Theme.SettingsBase from Settings to SettingsLib
- Create Theme.SubSettingsBase for client team

Bug: 182374464
Test: visual
Change-Id: Ia541e6e66dfdf029367c464eab96e5cf1e3f8d66