Uast: support internal class names in Java and method signatures in Java and Kotlin

plugins/uast-common/src/org/jetbrains/uast/declarations/UClass.kt

@@ -28,7 +28,8 @@ interface UClass : UDeclaration, UFqNamed, UModifierOwner, UAnnotated {
 
     val companions: List<UClass>
 
-    val internalName: String?
+    open val internalName: String?
+        get() = null
 
     val superTypes: List<UType>
     val declarations: List<UDeclaration>

plugins/uast-common/src/org/jetbrains/uast/declarations/UFunction.kt

@@ -25,6 +25,9 @@ interface UFunction : UDeclaration, UModifierOwner, UAnnotated {
     val body: UExpression
     val visibility: UastVisibility
 
+    open val bytecodeDescriptor: String?
+        get() = null
+
     fun getSuperFunctions(context: UastContext): List<UFunction>
 
     override fun traverse(handler: UastHandler) {