Report handled exceptions from NDK/C++

## What feature would you like to see?

Being able to report a handled crash or issue from NDK/C++. Currently I need to call a Java method to report a handled exception, but firebase groups them all at the Java handler code, so I get a single issue in the web console, while there are many different ones. Other option would be to be able to set a grouping hash as Bugsnag for example offers. Then I can determine myself how to group these native crashes.

## How would you use it?
Sometimes I have non fatal issues in NDK code, and would like to report them as handled exceptions. This seems not possible from NDK code itself.