`@AppStorage` crashes instead of coercing types

[dfabulich]

On iOS, @AppStorage will coerce types, allowing you to set a value as a Double and read it back as a String or vice versa, like the sample below.

On Android, if you navigate to the StringPreference screen, set the preference to "1.0" and then navigate to the DoublePreference screen, the app will crash.

java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Number
	at showcase.module.DoublePreference.getPreference$Showcase_debug(ContentView.kt:139)

import SwiftUI

enum Destination: String, CaseIterable {
    case stringPreference
    case doublePreference
}

struct ContentView: View {
    @State var navDestination: Destination = .stringPreference
    var body: some View {
        NavigationStack {
            VStack {
                NavigationLink(value: Destination.stringPreference) {
                    Text("String Preference")
                }
                NavigationLink(value: Destination.doublePreference) {
                    Text("Double Preference")
                }
            }
            .navigationDestination(for: Destination.self) { destination in
                switch destination {
                case .stringPreference:
                    StringPreference()
                case .doublePreference:
                    DoublePreference()
                }
            }
        }
    }
}

struct StringPreference: View {
    @AppStorage("preference") var preference = "0.0"

    var body: some View {
        VStack {
            Text("Preference: \(preference)")
            Button("1.0") {
                preference = "1.0"
            }
            Button("0.0") {
                preference = "0.0"
            }
        }
    }
}

struct DoublePreference: View {
    @AppStorage("preference") var preference = 0.0

    var body: some View {
        VStack {
            Text("Preference: \(preference)")
            Button("1.0") {
                preference = 1.0
            }
            Button("0.0") {
                preference = 0.0
            }
        }
    }
}