Using firebase-auth generates a manifest merger warning.

[ansman]

• Android Studio version: Android Studio Dolphin | 2021.3.1
• Firebase Component: Auth
• Component version: 19.4.0

Describe the problem

When using firebase-auth a warning is generated while merging the app manifest with the following error:

> Task :app:processDebugMainManifest
/path/to/repo/app/src/main/AndroidManifest.xml:24:9-31:50 Warning:
        activity#com.google.firebase.auth.internal.FederatedSignInActivity@android:launchMode was tagged at AndroidManifest.xml:24 to replace other declarations but no other declaration present

This is because the manifest looks like this in firebase-auth:

<activity
    android:name="com.google.firebase.auth.internal.FederatedSignInActivity"
    android:excludeFromRecents="true"
    android:exported="true"
    android:launchMode="singleTask"
    android:permission="com.google.firebase.auth.api.gms.permission.LAUNCH_FEDERATED_SIGN_IN"
    android:theme="@android:style/Theme.Translucent.NoTitleBar"
    tools:replace="android:launchMode" />
    <!--       ^ this is the problem and isn't needed -->

The indicated line could probably be removed.

Steps to reproduce:

Just include the firebase-auth component and run processDebugMainManifest or assemble

[google-oss-bot]

I found a few problems with this issue:

• I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.
• This issue does not seem to follow the issue template. Make sure you provide all the required information.

[argzdev]

Hi @ansman, thank you for reporting. I don't see the Firebase Auth in the latest version using FederatedSignInActivity. Could you try using that version 21.0.8 and see if this fixes the issue?

[google-oss-bot]

Hey @ansman. We need more information to resolve this issue but there hasn't been an update in 5 weekdays. I'm marking the issue as stale and if there are no new updates in the next 5 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!

[ansman]

Ah, I wasn't able to bump the auth version for other reasons so I couldn't check but I tried it in a new project and you're absolutely right!