chore: use emulator for example app

Author: russellwheatley

samples/swiftui/FirebaseSwiftUIExample/FirebaseSwiftUIExample/App/ContentView.swift

@@ -32,6 +32,8 @@ import SwiftUI
 
 struct ContentView: View {
   init() {
+    Auth.auth().useEmulator(withHost: "localhost", port: 9099)
+    Auth.auth().settings?.isAppVerificationDisabledForTesting = true
     Auth.auth().signInAnonymously()
     let actionCodeSettings = ActionCodeSettings()
     actionCodeSettings.handleCodeInApp = true