Fix visibility of protected classes in bytecode

Protected should be translated to public as in Java so that everything would
work at runtime. The real visibility is still saved to an InnerClasses
attribute

 #KT-8269 Fixed
 #KT-9246 Fixed
 #KT-10143 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/AsmUtil.java

@@ -265,6 +265,7 @@ public class AsmUtil {
             return getVisibilityAccessFlagForAnonymous(descriptor);
         }
         if (descriptor.getVisibility() == Visibilities.PUBLIC ||
+            descriptor.getVisibility() == Visibilities.PROTECTED ||
             // TODO: should be package private, but for now Kotlin's reflection can't access members of such classes
             descriptor.getVisibility() == Visibilities.LOCAL ||
             descriptor.getVisibility() == Visibilities.INTERNAL) {