OTP is coming as web login and not detected by the SDK

### Step 1: Are you in the right place?

Yes

### Step 2: Describe your environment

* Android device: Samsung M21
* Android OS version: 10
* Google Play Services version: 20.47.14
* Firebase/Play Services SDK version: _____
* FirebaseUI version: 7.1.1 (Latest)

### Step 3: Describe the problem:
Problems are regarding sign-in and while upgrading from 6.x to 7.x :

**1. SMS OTP is not detected automattically.**
See attached video, OTP is not detected in the latest version.

https://user-images.githubusercontent.com/7250906/104368913-ba7eb280-5542-11eb-9bbc-b735bbf38ac5.mp4

**2. Showing internal Google project ID/Default firebase hosting site in a custom tab while signing in.**
As seen in the above video, while signing in, a blank custom tab is opened with my Default hosting site i.e. _< google-project-id >.firebaseapp.in_ which has internal Google project ID (Instead of my desired site name). Why is this page coming?

**3. OTP is showing as web login to Default firebase hosting site**
See thess OTP messages, now the OTP is coming as if signing in to web (That too from Default hosting site with internal Google project ID (Instead of my desired site name). Compare with old OTP.

#### Expected Results:
1. OTPs to be detected automatically as earlier.
2. No extra custom tabs (if it's required, then show my selected website from the Firebase hosting sites)
3. OTP messages should show my app name, instead of website. (if it's required, then show my selected website from the Firebase hosting sites)