Parse native threads from AppExitInfo for native crashes

[romtsn]

Description

We can enrich native crashes even further by parsing traceInputStream when the reason was REASON_CRASH_NATIVE

Bugsnag prior art https://github.com/bugsnag/bugsnag-android/tree/next/bugsnag-plugin-android-exitinfo/src/main/java/com/bugsnag/android

[supervacuus]

FYI: This is related with the investigation here: getsentry/sentry-native#743 (comment)

[supervacuus]

However, tombstones won't necessarily decode what caused the SIGABRT. There is a good chance that the SIGABRT was an unhandled C++ exception, which would require a terminate handler to decode what happened.

[markushi]

Let's still enrich the native envelopes with matching AppExitInfo, as we already have all the necessary parts ready.