- reserve 2 lines for the data saver summary to avoid the preference
beging relayout when the summary text get updates.
Change-Id: Ibced7dc4b9620fe45541ea470d34bf83be66480d
Fix: 37925232
Test: visual
- Extend preference_category to support summary text
- Removed work_profile_category, used by account list
- align prefs in storage settings
- Use Preference instead of PrefScreen in xmls
- Use proper footer preference in NightDisplaySettings, BatterySaver,
DataSaver, AutomaticStorageManage
- Remove WallOfTextPreference
Bug: 33775510
Test: visual
Change-Id: I28156b857ff5acac8746c42384dc03d5997ebd9d