Align more prefs for icon space.

- 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

src/com/android/settings/accounts/AccountPreferenceController.java

@@ -271,7 +271,6 @@ public class AccountPreferenceController extends PreferenceController
         } else {
             List<UserInfo> profiles = mUm.getProfiles(UserHandle.myUserId());
             final int profilesCount = profiles.size();
-            final boolean addCategory = profilesCount > 1;
             for (int i = 0; i < profilesCount; i++) {
                 updateProfileUi(profiles.get(i));
             }
@@ -298,7 +297,6 @@ public class AccountPreferenceController extends PreferenceController
             preferenceGroup.setContentDescription(
                 mContext.getString(R.string.account_settings));
         } else if (userInfo.isManagedProfile()) {
-            preferenceGroup.setLayoutResource(R.layout.work_profile_category);
             preferenceGroup.setTitle(R.string.category_work);
             String workGroupSummary = getWorkGroupSummary(context, userInfo);
             preferenceGroup.setSummary(workGroupSummary);