Merge "onAccountsUpdated shouldn't be called back after listener unregistered"

        handler = (handler == null) ? mMainHandler : handler;

        handler.post(new Runnable() {

            public void run() {

                synchronized (mAccountsUpdatedListeners) {

                    try {

                        if (mAccountsUpdatedListeners.containsKey(listener)) {

                            listener.onAccountsUpdated(accountsCopy);

                        }

                    } catch (SQLException e) {

                        // Better luck next time.  If the problem was disk-full,

                        // the STORAGE_OK intent will re-trigger the update.

                        Log.e(TAG, "Can't update accounts", e);

                    }

                }

            }

        });

    }