[firebase_auth][Phone auth][ios] RECAPTCHA deep links are broken since Flutter's 3.27 deep links flag change

[tpucci]

It seems RECAPTCHA deep link are broken since Flutter's 3.27 deep links flag change.

Workaround:

Info.plist

	<key>FirebaseEncodedAppId</key>
	<string>$(FIREBASE_ENCODED_APP_ID)</string>

AppDelegate.swift

  // Handle Firebase Auth post RECAPTCHA deep links
  override func application(
        _ app: UIApplication,
        open url: URL,
        options: [UIApplication.OpenURLOptionsKey: Any] = [:]
    ) -> Bool {
      if let firebaseEncodedAppId = Bundle.main.object(forInfoDictionaryKey: "FirebaseEncodedAppId") as? String,
         url.scheme == firebaseEncodedAppId {
          // Let Firebase handle the URL
          return true
      }
      return super.application(app, open: url, options: options)
  }

---

FYI I've tried Auth.auth().canHandle(url) but it returns false... I don't know why

Originally posted by @tpucci in #17135

[SelaseKay]

Duplicate of #17135

[tpucci]

@SelaseKay
Please reopen because the other issue is marked blocked waiting for customer.
I opened this one because on the other one the bot will close the issue.