Modernize and Unify Golden Tiles Architecture and Visuals

[ithinkihaveacat]

Context

As part of the modernization of the WearTilesKotlin module, the main MessagingTileService was migrated to the stable 1.4/1.6 releases and unified under the Material3TileService architecture.

To keep the initial migration PR #1367 focused and to simplify the review process, the reference layouts in com.example.wear.tiles.golden (debug source set) were intentionally left in their current state. While they remain fully functional and correctly render with Material 3 Dynamic Colors on API 36+ devices, they still utilize a custom BaseTileService wrapper and older static preview assets.

This issue tracks the planned follow-up to unify these reference implementations with the rest of the module's architecture.

Planned Work

1. Refactor Architecture:

   • Migrate all Golden Tile implementations (Alarm, Calendar, Goal, etc.) from the custom BaseTileService to extend Material3TileService natively.
   • Unify resource management and request logic with the modern tileResponse pattern used in the main sample.
   • Remove the now-redundant BaseTileService.kt.

2. Refresh Visual Assets:

   • Regenerate the static preview PNGs (tile_preview_*.png) from an API 36 emulator to reflect the current Material 3 dynamic look.
   • Update the golden_tiles.png master screenshot in the README.md.

Goal

The final outcome will be a cohesive module where all Tiles—both main and reference—follow a single architectural pattern, providing a consistent and modern learning resource for developers.

[ithinkihaveacat]

For reference, the branch I will use for the PR is https://github.com/ithinkihaveacat/wear-os-samples/tree/tiles-1.6-update. (Ready to go, but don't want to create the PR yet to reduce confusion … it's on top of the https://github.com/ithinkihaveacat/wear-os-samples/tree/migrate-messaging-tile branch.)