Android Browser Privacy Settings: "Clear cookies" and "clear cache"
To reset the Flash based data storage (technically like cookies), you have to wipe the data for the Flash Plugin. Home => Settings => Applications => Manage Applications => Adobe Flash Player => Clear Data.  I would do the same procedure for your browser application, too, if have nothing valuable saved in the browser settings/passwords.

I wish Adobe had provided some form of privacy configuration application as they started to include with latest Flash Plugin for desktops.