Smarter prototype handler for addon.tab.traps API

[WorldLanguages]

The current prototype handler hurts project performance and it's been reported it causes memory leaks. Let's require addons to specify in the manifest what types of traps they'll use, store in local storage (this is already being done now, but with a boolean, aka "I'm using traps", to avoid performance issues if the user doesn't need traps) with the already existing system to do so.

cc @apple502j