[ANDROID] Simplify parcelize ir plugin code

- avoid direct usages of CommonBackendContext & Backend Symbols

plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ParcelableIrGeneratorExtension.kt

@@ -13,6 +13,9 @@ import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 @Suppress("DEPRECATION_ERROR")
 class ParcelableIrGeneratorExtension : org.jetbrains.kotlin.backend.common.extensions.PureIrGenerationExtension {
     override fun generate(moduleFragment: IrModuleFragment, context: CommonBackendContext) {
-        ParcelableIrTransformer(context, AndroidSymbols(context, moduleFragment)).transform(moduleFragment)
+        val arrayOfNulls = context.ir.symbols.arrayOfNulls
+        val charSequence = context.ir.symbols.charSequence
+        val androidSymbols = AndroidSymbols(context.irBuiltIns, arrayOfNulls, charSequence, moduleFragment)
+        ParcelableIrTransformer(context, androidSymbols).transform(moduleFragment)
     }
 }

plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/AndroidSymbols.kt

@@ -30,13 +30,11 @@ import org.jetbrains.kotlin.name.Name
 // hence contain just enough information to produce correct JVM bytecode for *calls*. In particular, we omit generic types and
 // supertypes, which are not needed to produce correct bytecode.
 class AndroidSymbols(
-    context: CommonBackendContext,
+    val irBuiltIns: IrBuiltIns,
+    val arrayOfNulls: IrSimpleFunctionSymbol,
+    private val charSequence: IrClassSymbol,
     private val moduleFragment: IrModuleFragment
 ) {
-    val irBuiltIns: IrBuiltIns = context.irBuiltIns
-
-    val irSymbols: Symbols<CommonBackendContext> = context.ir.symbols
-
     private val androidOs: IrPackageFragment = createPackage("android.os")
 
     private val androidText: IrPackageFragment = createPackage("android.text")
@@ -117,7 +115,7 @@ class AndroidSymbols(
         modality = Modality.ABSTRACT
     }.apply {
         createImplicitParameterDeclarationWithWrappedDescriptor()
-        val t = addTypeParameter("T", context.irBuiltIns.anyNType)
+        val t = addTypeParameter("T", irBuiltIns.anyNType)
         parent = androidOsParcelable.owner
 
         addFunction("createFromParcel", t.defaultType, Modality.ABSTRACT).apply {
@@ -128,7 +126,7 @@ class AndroidSymbols(
             "newArray", irBuiltIns.arrayClass.typeWith(t.defaultType.makeNullable()),
             Modality.ABSTRACT
         ).apply {
-            addValueParameter("size", context.irBuiltIns.intType)
+            addValueParameter("size", irBuiltIns.intType)
         }
     }.symbol
 
@@ -386,7 +384,7 @@ class AndroidSymbols(
 
     val textUtilsWriteToParcel: IrSimpleFunctionSymbol =
         androidTextTextUtils.owner.addFunction("writeToParcel", irBuiltIns.unitType, isStatic = true).apply {
-            addValueParameter("cs", irSymbols.charSequence.defaultType)
+            addValueParameter("cs", charSequence.defaultType)
             addValueParameter("p", androidOsParcel.defaultType)
             addValueParameter("parcelableFlags", irBuiltIns.intType)
         }.symbol

plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/IrParcelSerializers.kt

@@ -216,7 +216,7 @@ class IrArrayParcelSerializer(
 ) : IrParcelSerializer {
     private fun AndroidIrBuilder.newArray(size: IrExpression): IrExpression {
         val arrayConstructor: IrFunctionSymbol = if (arrayType.isBoxedArray)
-            androidSymbols.irSymbols.arrayOfNulls
+            androidSymbols.arrayOfNulls
         else
             arrayType.classOrNull!!.constructors.single { it.owner.valueParameters.size == 1 }
 

plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/ParcelableIrTransformer.kt

@@ -190,7 +190,7 @@ class ParcelableIrTransformer(private val context: CommonBackendContext, private
                         body = context.createIrBuilder(symbol).run {
                             irExprBody(
                                 parcelerNewArray(parcelerObject, sizeParameter)
-                                    ?: irCall(androidSymbols.irSymbols.arrayOfNulls, arrayType).apply {
+                                    ?: irCall(androidSymbols.arrayOfNulls, arrayType).apply {
                                         putTypeArgument(0, arrayType)
                                         putValueArgument(0, irGet(sizeParameter))
                                     }