Attempt to fix bug on devices where multi-user support is disabled.

    }

    private void enableUserSelectorIfNecessary() {

        if (!UserManager.supportsMultipleUsers()) {

            return; // device doesn't support multi-user mode

        }

        // if there are multiple users, we need to enable to multi-user switcher

        UserManager mUm = (UserManager) mContext.getSystemService(Context.USER_SERVICE);

        List<UserInfo> users = mUm.getUsers(true);