Don't append list of accounts every time we return to this screen.

Bug: 5355920

Remove the contents of the layout before adding the accounts.

Change-Id: Ic9256140f892968b2388f47d982eaada720df892

src/com/android/settings/MasterClear.java

@@ -175,6 +175,7 @@ public class MasterClear extends Fragment {
     private void loadAccountList() {
         View accountsLabel = mContentView.findViewById(R.id.accounts_label);
         LinearLayout contents = (LinearLayout)mContentView.findViewById(R.id.accounts);
+        contents.removeAllViews();
 
         Context context = getActivity();