Firebase Auth UI - Opt out from Material Theme

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Step 2: Describe your environment

Android device: _____
Android OS version: _____
Google Play Services version: _____
Firebase/Play Services SDK version: _____
FirebaseUI version: 8.0.0
Step 3: Describe the problem:

We really work hard on theming Firebase UI screen across device and version our app supports, however with this new update we are now force to use Material Theme. We no longer want to change our theme or style as it is very hard to make it work properly across device. How can we opt out from Material Theme?

Steps to reproduce:

Update from 7.2.0 to 8.0.0

Observed Results:

Incorrect colors which can result in fragmented behavior depending on OS version or device model

Expected Results:

Unified styling, ability to set each view color programmatically is the ideal solution as it is hard to work on style xml with Firebase Auth UI.

Relevant Code:

  // TODO(you): code here to reproduce the problem

firebase / FirebaseUI-Android