Update text for Users & accounts page.

- add back the summary loader for UserSettings
- remove "configure" preference category
- add summary for Auto sync data and update the title

Change-Id: Ia00397f775f86d0e160a54783a8518847fce8de8
Bug: 36540644
Test: builds

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

@@ -100,8 +100,8 @@ public class UserAndAccountDashboardFragment extends DashboardFragment {
             if (listening) {
                 UserInfo info = mContext.getSystemService(UserManager.class).getUserInfo(
                         UserHandle.myUserId());
-                mSummaryLoader.setSummary(this, mContext.getString(R.string.user_summary,
-                        info.name));
+                mSummaryLoader.setSummary(this,
+                    mContext.getString(R.string.users_and_accounts_summary, info.name));
             }
         }
     }