Java profiling for Fennec broken

[buttercookie42]

Profiling C++/JS works fine, however when trying to profile Java code as well, the process hangs at the "Retrieving profile" stage.
Looking at the debug output, it gets as far as

Get profile
get json profile
got json profile

and then runs into trouble here because the Java thread doesn't have any frameTable data. In fact, it doesn't appear to have anything but simple sample data with frames.

[bgirard]

Thanks. @snorp reporting fennec profiling not working but I was not able to reproduce it. Perhaps this was why. Ideally this code should be more permissive. Perhaps warn and continue to show the data that was collect.

We should fix Java profiling but ATM I'm not aware of anyone needing it.