Update publish-to-s3 Gradle plugin to 0.9.0

[oguzkocer]

We added Android publishing block support to publish-to-s3 Gradle plugin in Automattic/publish-to-s3-gradle-plugin#31. With this change, we don't need the androidSourcesJar task anymore. It also addresses the following warning:

WARNING:Software Components will not be created automatically for Maven publishing from Android Gradle Plugin 8.0. To opt-in to the future behavior, set the Gradle property android.disableAutomaticComponentCreation=true in the gradle.properties file or use the new publishing DSL.

I am making this change to prepare the library for a future AGP 8.0 update, so releasing a new version is not necessary at the moment.

To Test

Verify that buildkite/permissme/publish-to-s3-maven CI job is successful