feat: add Samsung TV Tizen ID support

[bhanwadiyaaditya]

Java server integrations can now represent Samsung TV devices and include their Tizen Advertising ID in device_info. Adds the Samsung TV platform option, the tizen_advertising_id property, and coverage for its accessors and JSON round trip.

Recreates #31 with a signed commit and LF line endings so the functional changes are easy to review. Credits Ignacio Linari as co-author and adds an unreleased changelog entry.

Validation: SDK assembly and all six local-only tests passed on JDK 17. A separate request-construction check confirmed that the real Retrofit serializer includes the Tizen Advertising ID. Maven Central returned HTTP 429, so local validation used a temporary Google Maven Central mirror configuration; repository build settings are unchanged. The existing uploadCustomEventTest, which sends requests to the production S2S endpoint, was excluded. No live ingestion or release was performed.

[cursor]

PR Summary

Low Risk
Additive model and enum fields with tests; no changes to auth, networking, or existing platform behavior.

Overview
Extends DeviceInformation so server-side event payloads can identify Samsung TV clients and carry a Tizen advertising identifier in device_info.

Adds SAMSUNG_TV (samsung_tv) to PlatformEnum, plus a tizen_advertising_id field with fluent setter, getters/setters, and updates to equals, hashCode, and toString. A unit test checks enum resolution, accessors, and Gson JSON round-trip. CHANGELOG.md documents the addition under [Unreleased].

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[jamesnrokt]

Approved but noting when I was verifying the format I couldn't see the platform type showing on docs, do we need a followup PR there?

[bhanwadiyaaditya]

Approved but noting when I was verifying the format I couldn't see the platform type showing on docs, do we need a followup PR there?

Thanks James! The current JSON reference already includes samsung_tv and tizen_advertising_id. The older /developers/server/ link appears broken and is being redirected.