Automatic registration of callbacks

[smover]

The goal is to register all the possible callbacks for all the objects.

There are two main mechanism to register callbacks.

1. One is to extend the methods when the app code extends a framework class (e.g. the onCreate method for an activity object)
2. The other is to register the callback through a specific method on a framework object.

[smover]

@ftc just added the issue. I think we should document here how we want to implement the registration

[ftc]

Current plan: write code to find the callbacks which are implemented in MUSE corpus apps using either Graph Extractor or Feature Extractor. These can be detected by finding methods implemented in the app which are inherited from framework objects or from interfaces.

finding registration methods:

• look for methods which say "set.*Listener"
• look for methods where something of the type of the framework class the callback is inherited from is taken as a paremeter