Generate stub java.lang.Class in IR JvmSymbols instead of scope reading

Before this commit, java.lang.Class was read via JvmBackendContext,
its module descriptor and its package member scope.
However, this works only for old FE with descriptors and
descriptor-based scopes available.

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmSymbols.kt

@@ -51,6 +51,7 @@ class JvmSymbols(
 
     private val kotlinJvmInternalPackage: IrPackageFragment = createPackage(FqName("kotlin.jvm.internal"))
     private val kotlinJvmFunctionsPackage: IrPackageFragment = createPackage(FqName("kotlin.jvm.functions"))
+    private val javaLangPackage: IrPackageFragment = createPackage(FqName("java.lang"))
 
     private fun createClass(fqName: FqName, classKind: ClassKind = ClassKind.CLASS, block: (IrClass) -> Unit): IrClass =
         buildClass {
@@ -60,6 +61,7 @@ class JvmSymbols(
             parent = when (fqName.parent().asString()) {
                 "kotlin.jvm.internal" -> kotlinJvmInternalPackage
                 "kotlin.jvm.functions" -> kotlinJvmFunctionsPackage
+                "java.lang" -> javaLangPackage
                 else -> error("Other packages are not supported yet: $fqName")
             }
             createImplicitParameterDeclarationWithWrappedDescriptor()
@@ -93,8 +95,7 @@ class JvmSymbols(
     override val getContinuation: IrSimpleFunctionSymbol
         get() = TODO("not implemented")
 
-    val javaLangClass: IrClassSymbol =
-        context.getTopLevelClass(FqName("java.lang.Class"))
+    val javaLangClass: IrClassSymbol = createClass(FqName("java.lang.Class")) {}.symbol
 
     val lambdaClass: IrClassSymbol = createClass(FqName("kotlin.jvm.internal.Lambda")) { klass ->
         klass.addConstructor().apply {