Unity unhandled exception proguard flow

[konraddysput]

Why

Unity uncaught exception handler can also capture unhandled exceptions thrown by the managed Java code. The following code in the java managed layer can be captured by Unity exception handler:

  throw new RuntimeException("Unity-test: Uncaught JVM exception");

In this flow we didn't apply proguard symbolication. This patch makes sure the symbolication flow is applied in the unity uncaught exception handler.

ref: BT-2993