Provides App Delegate handlers to be used in your App Delegate.
To save time integrating Firebase Analytics in an application, Firebase Analytics does not
require delegation implementation from the AppDelegate if neither SwiftUI nor UIScene lifecycle
is adopted. Instead this is automatically done by Firebase Analytics. Should you choose instead
to delegate manually, you can turn off the App Delegate Proxy by adding
FirebaseAppDelegateProxyEnabled into your app’s Info.plist and setting it to boolean NO, and
adding the methods in this category to corresponding delegation handlers.
To handle Universal Links, you must return true in
UIApplicationDelegate.application(_:didFinishLaunchingWithOptions:).