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Removed the orphaned, unpublished :library module (which previously called MapsApiSettings.addInternalUsageAttributionId from Maps SDK) and removed its entry from settings.gradle.kts and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

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📚 Stacked PR Chain

#	PR	Description	Base	Status
1	#115	ci/workflow-security-hardening (Workflow permissions & action pinning)	main	✅ CI Passing
2	#116	test/library-coverage-baseline (Test suite reaching 93.8% coverage)	#115	✅ CI Passing
3	#117	build/dependency-modernization (AGP 9.3.2, Gradle 9.5.1, Places 5.3.0)	#116	✅ CI Passing
4	👉 #119	feat/places-usage-attribution (Usage attribution & remove :library)	#117	✅ CI Passing
5	#118	demo/ux-edge-to-edge-polish (Demo UX, edge-to-edge, mock location)	#119	✅ CI Passing

Umbrella PR: #109

[googlemaps-bot]

Code Coverage

Overall Project	86.5%	🍏
Files changed	100%	🍏

File	Coverage
AttributionIdInitializer.kt	100%	🍏

[LoyalAbbas]

LGTM