valueOf doesn't support abstract parameters on Instrumented Android Tests

[vitorhugods]

Issue

When running tests with parameters that are abstract classes on Android or in older JVMs, a NullPointerException is thrown.

java.lang.NullPointerException: Attempt to read from null array
at javassist.util.proxy.SecurityActions.getCallerClass(SecurityActions.java:54)
at javassist.util.proxy.DefineClassHelper$Java7.defineClass(DefineClassHelper.java:174)
at javassist.util.proxy.DefineClassHelper.toClass(DefineClassHelper.java:260)
at javassist.util.proxy.FactoryHelper.toClass(FactoryHelper.java:154)
at javassist.util.proxy.ProxyFactory.createClass3(ProxyFactory.java:640)
at javassist.util.proxy.ProxyFactory.createClass2(ProxyFactory.java:624)
at javassist.util.proxy.ProxyFactory.createClass1(ProxyFactory.java:560)
at javassist.util.proxy.ProxyFactory.createClass(ProxyFactory.java:481)
at javassist.util.proxy.ProxyFactory.create(ProxyFactory.java:828)
at io.mockative.fake.ValueOfJVM.makeValueOf(ValueOf.kt:55)
at io.mockative.fake.ValueOfJVM.makeValueOf(ValueOf.kt:31)
at io.mockative.fake.ValueOfKt.valueOf(ValueOf.kt:84)

How to reproduce

1. Run an Android emulator or connect a physical Android device
2. ./gradlew :shared:connectedDebugAndroidTest

Cause

It seems Javassist doesn't like Android when instantiating proxy classes:

• does this project support android? jboss-javassist/javassist#360

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Maybe use a solution similar to MockK's?