Revert "Revert "Move global sync settings to AccountSettings.""

This reverts commit 4869faf465.

Change-Id: I58df9b8161d711a9c0187af1f1a1dc279fb9d9ab

src/com/android/settings/DataUsageSummary.java

@@ -489,6 +489,7 @@ public class DataUsageSummary extends HighlightingFragment implements Indexable
                 hasReadyMobileRadio(context) && isOwner && !appDetailMode);
         mMenuRestrictBackground.setChecked(mPolicyManager.getRestrictBackground());
 
+        // TODO: Define behavior of this sync button. See: http://b/16076571
         mMenuAutoSync = menu.findItem(R.id.data_usage_menu_auto_sync);
         mMenuAutoSync.setChecked(ContentResolver.getMasterSyncAutomatically());
         mMenuAutoSync.setVisible(!appDetailMode);