Using AbsSavedState instead of BaseSavedState in base class to support inherited custom view

BasePostView.kt

abstract class BasePostView : FrameLayout {
    ...
    internal class SavedState : AbsSavedState {
        var title: String? = null
        var description: String? = null

        constructor(superState: Parcelable) : super(superState)

        constructor(source: Parcel, loader: ClassLoader?) : super(source, loader) {
            title = source.readString()
            description = source.readString()
        }

        override fun writeToParcel(out: Parcel, flags: Int) {
            super.writeToParcel(out, flags)
            out.writeString(title)
            out.writeString(description)
        }
        ...
    }
}