feat(attribution): register usage attribution with Places SDK and remove legacy library module

[dkhawk]

Description

This PR implements usage attribution reporting for :places-compose using the Google Places SDK's addInternalUsageAttributionId API:

1. Dynamic Attribution ID Generation

Added a generateArtifactIdFile Gradle task in places-compose/build.gradle.kts that outputs an AttributionId.VALUE object based on the project version:

public object AttributionId {
    public const val VALUE: String = "gmp_git_androidplacescompose_v0.2.1"
}

2. Startup Initializer

Added AttributionIdInitializer : Initializer<Unit> in places-compose calling:

Places.addInternalUsageAttributionId(AttributionId.VALUE)

Registered via androidx.startup.InitializationProvider in places-compose/src/main/AndroidManifest.xml so attribution is seamlessly reported with Places SDK requests.

3. Verification

Added AttributionIdInitializerTest verifying that Places.addInternalUsageAttributionId is correctly invoked on startup.

4. Cleanup of Orphaned :library Module

Removed the orphaned, unpublished :library module (which previously called MapsApiSettings.addInternalUsageAttributionId from Maps SDK) and removed its entry from settings.gradle.kts and places-compose-demo/build.gradle.kts.

Part of a stacked PR sequence:

• Base PR: build(deps): update AGP to 9.3.2, Gradle to 9.5.1, Places SDK to 5.3.0, and Compose BOM #117 (build/dependency-modernization)

[googlemaps-bot]

Code Coverage

Overall Project	86.5%	🍏
Files changed	100%	🍏

File	Coverage
AttributionIdInitializer.kt	100%	🍏