Add binary architecture of application to payload

[fractalwrench]

Goal

64-bit devices on Android can load 32-bit libraries, as mixing between 32/64 bits is not allowed. This changeset explicitly adds the binary arch used by the app at runtime to handled and unhandled reports, to allow the pipeline to select the correct mapping file for stacktrace deobfuscation.

Changeset

• Added bsg_binary_arch to calculate the current architecture.
• Added field to handled native reports by setting the binary arch on bugsnag_init, via the NativeInterface.
• Added field to unhandled native reports by setting the binary arch in the serializer.

Tests

Altered existing mazerunner scenarios to ensure that a handled/unhandled native exception contain the app.binaryArch field.