[IR] Simplify IrFileImpl and IrExternalPackageFragment

#KT-65773 In Progress

plugins/parcelize/parcelize-compiler/parcelize.backend/src/org/jetbrains/kotlin/parcelize/AndroidSymbols.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2024 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
@@ -17,6 +17,7 @@ import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
 import org.jetbrains.kotlin.ir.declarations.IrFactory
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.declarations.IrPackageFragment
+import org.jetbrains.kotlin.ir.declarations.createEmptyExternalPackageFragment
 import org.jetbrains.kotlin.ir.declarations.impl.IrExternalPackageFragmentImpl
 import org.jetbrains.kotlin.ir.declarations.impl.IrFactoryImpl
 import org.jetbrains.kotlin.ir.symbols.*
@@ -552,7 +553,7 @@ class AndroidSymbols(
         }.symbol
 
     private fun createPackage(packageName: String): IrPackageFragment =
-        IrExternalPackageFragmentImpl.createEmptyExternalPackageFragment(
+        createEmptyExternalPackageFragment(
             moduleFragment.descriptor,
             FqName(packageName)
         )