Parcelable: Correctly handle writeToParcel() overriding, report errors on custom writeToParcel() and CREATOR

plugins/android-extensions/android-extensions-idea/testData/android/parcel/checker/customCreator.kt

@@ -0,0 +1,16 @@
+package test
+
+import kotlinx.android.parcel.MagicParcel
+import android.os.Parcelable
+import android.os.Parcel
+
+@MagicParcel
+class A(val a: String) : Parcelable {
+    companion object {
+        @JvmField
+        val <error descr="[CREATOR_DEFINITION_IS_FORBIDDEN] 'CREATOR' definition is forbidden. Use 'Parceler' nested object instead.">CREATOR</error> = object : Parcelable.Creator<A> {
+            override fun createFromParcel(source: Parcel): A = A("")
+            override fun newArray(size: Int) = arrayOfNulls<A>(size)
+        }
+    }
+}

plugins/android-extensions/android-extensions-idea/testData/android/parcel/checker/customWriteToParcel.kt

@@ -0,0 +1,21 @@
+package test
+
+import kotlinx.android.parcel.MagicParcel
+import android.os.Parcelable
+import android.os.Parcel
+
+@MagicParcel
+class A(val a: String) : Parcelable {
+    <error descr="[OVERRIDING_WRITE_TO_PARCEL_IS_FORBIDDEN] Overriding 'writeToParcel' is forbidden. Use 'Parceler' nested object instead.">override</error> fun writeToParcel(p: Parcel?, flags: Int) {}
+    override fun describeContents() = 0
+}
+
+@MagicParcel
+class B(val a: String) : Parcelable {
+    <error descr="[OVERRIDING_WRITE_TO_PARCEL_IS_FORBIDDEN] Overriding 'writeToParcel' is forbidden. Use 'Parceler' nested object instead.">override</error> fun writeToParcel(p: Parcel?, flags: Int) {}
+}
+
+@MagicParcel
+class C(val a: String) : Parcelable {
+    <error descr="[OVERRIDING_WRITE_TO_PARCEL_IS_FORBIDDEN] Overriding 'writeToParcel' is forbidden. Use 'Parceler' nested object instead.">override</error> fun writeToParcel(p: Parcel, flags: Int) {}
+}