Update AGP to 9.0.0-beta03

[mcarare]

• Update android-gradle-plugin version in version catalog.
• Remove kotlin-android plugin alias from version catalog and root build file.
• Migrate android.applicationVariants.configureEach logic in app/build.gradle to androidComponents API (beforeVariants and onVariants) to support AGP 9.0.
• Use variant.buildConfigFields.put instead of buildConfigField.
• Update version code generation logic to use variant.outputs within onVariants.
• Remove variantFilter block in favor of beforeVariants disabling.
• Migrate kotlinOptions.allWarningsAsErrors to tasks.withType(KotlinCompile).compilerOptions.

Pull Request checklist

• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

[rvandermeulen]

This looks great, thanks for getting it figured out! Just documenting here what we discussed on Slack that we probably want to manually specify the Kotlin version still rather than relying on whatever one AGP happens to want to use. Looks like a pretty easy thing to add:
https://issuetracker.google.com/issues/438678642#comment21

[mergify]

Merge Queue Status

🚫 The pull request has left the queue (rule: default)

This pull request spent 12 minutes 57 seconds in the queue, with no time running CI.
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Reason

Pull request #3988 has been dequeued by a dequeue command

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You should look at the reason for the failure and decide if the pull request needs to be fixed or if you want to requeue it.
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[rvandermeulen]

@mergify dequeue

[mergify]

dequeue

✅ The pull request has been removed from the queue

[rvandermeulen]

@jonalmeida Something is very broken with mergify. I'm actually not opposed to this landing when CI is green, but it should probably get an r+ first at least 😆

[jonalmeida]

Let me take a look!

[rvandermeulen]

While this is still in Beta, it's getting pretty close to a stable release and I think it'd be beneficial for us to start getting some exposure to AGP 9.0 now to aid in the eventual Firefox transition down the road. I'd vote in favor of landing this but will defer to @jonalmeida to make the final call.

[jonalmeida]

@Mergifyio refresh

[mergify]

refresh

✅ Pull request refreshed

[mergify]

Merge Queue Status

✅ The pull request has been merged

This pull request spent 34 minutes 4 seconds in the queue, including 33 minutes 51 seconds running CI.
The checks were run in-place.

Required conditions to merge

• status-success=pr-complete

[jonalmeida]

My changes to Github configuration did not work and this merged while I was in a meeting. 🤦