Support for getStackTrace() and setStackTrace()

[kodoman]

Hi Salomon,

We're in the process of integrating your plugin in our app.

It would be very beneficial to be able to manipulate the stack trace before sending the ANRError to Firebase Crashlytics, so we can group the ANR issues together in the console there. Crashlytics groups the issues based on the topmost frame in the stack trace, so we were thinking of adding a custom frame to the top to let Firebase know that it belongs next to other ANR issues.

I've tried using couple of methods inherited from Throwable, but they don't seem to be overriden in the ANRError class - getStackTrace() returns an empty array and setStackTrace() doesn't seem to do anything.

So my questions are:

1. Is there a way to add a custom frame to the top of the stack trace in the ANRError?
2. If not, do you plan to add the support for manipulating the stack trace of the ANRError?

BTW, thanks for creating this plugin and making it open-source! It's a lifesaver amidst the current shortage of ANR detectors 😃

[SalomonBrys]

I do not have time to maintain this, but please put together a PR, and I'll release a new version ;)