[Expressive] Update button preference padding for expressive design

- Added 16dp padding to top and bottom.
- Create SettingsLibButtonPreferenceStyle and SettingsLibButtonPreferenceStyle.Expressive to manage common styles

Fix: 402821431
Test: presubmit + manual
Flag: EXEMPT resource only
Change-Id: Ic9389fde45bc4dc11ff97e6ed48b7847be5a4b3e