Invisible Edit text Field on Oppo Vivo and some samsung phones

[souragar]

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Step 2: Describe your environment

• Android device: ___Samsung __
• Android OS version: _____ 9
• Google Play Services version: _____11.4.2
• Firebase/Play Services SDK version: _____11.4.2
• FirebaseUI version: ____6.0.2

Step 3: Describe the problem:

In some phones the text and edit text fields are invisible. Works fine on most phones

Steps to reproduce:

1. _____Click on phone or email login to see this

2. ---

3. ---

Observed Results:

• What happened? This could be a description, logcat output, etc.

Expected Results:

• What did you expect to happen?

Relevant Code:

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

[souragar]

It works fine on all the phones which I have like this