Parcelize: Add the Parcelize compiler plugin with sources extracted from Android Extensions plugin (KT-40030)

plugins/parcelize/parcelize-compiler/testData/box/openParcelize.kt

@@ -0,0 +1,19 @@
+// WITH_RUNTIME
+
+@file:JvmName("TestKt")
+package test
+
+import kotlinx.parcelize.*
+import android.os.Parcel
+import android.os.Parcelable
+
+@Parcelize
+open class Base(val a: String) : Parcelable
+
+@Parcelize
+class Inh(var b: Int) : Base(""), Parcelable
+
+fun box(): String {
+    Inh(0)
+    return "OK"
+}