Update agp to v9.3.1

[juul-mobile-bot]

This PR contains the following updates:

Package	Change	Age	Confidence
com.android.library (source)	9.3.0 → 9.3.1
com.android.kotlin.multiplatform.library (source)	9.3.0 → 9.3.1
com.android.application (source)	9.3.0 → 9.3.1

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This PR has been generated by Mend Renovate.

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Note

Low Risk
Single patch-level dependency bump in the version catalog with no runtime or business-logic changes.

Overview
Bumps the shared agp version in gradle/libs.versions.toml from 9.3.0 to 9.3.1, which updates the Android Gradle plugins that reference it (com.android.application, com.android.library, and com.android.kotlin.multiplatform.library).

No application or library source changes—only the build toolchain version.

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