Bump Gradle image; add consumer ProGuard rules

[0xh3rman]

Changes:

• Upgrade Gradle base image to gradle:9.0.0-jdk17 to align with AGP 9.x. Enable android.nonFinalResIds=true to support the AGP migration.
• Add placeholder consumer ProGuard rules for perpetual and referral feature modules.
• Update reproducible/base_image_tag.txt to reflect the new base image date.

[gemini-code-assist]

Summary of Changes

Hello @0xh3rman, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request primarily focuses on updating the project's build environment and configuration to prepare for future Android Gradle Plugin (AGP) versions, specifically AGP 9.x. It involves upgrading the Dockerized Gradle environment, adjusting Android resource ID handling, and introducing foundational ProGuard rules for new feature modules to ensure proper obfuscation and shrinking.

Highlights

• Gradle Image Upgrade: The Gradle base image in the Dockerfile was upgraded from gradle:8.13-jdk17 to gradle:9.0.0-jdk17 to align with upcoming AGP 9.x requirements.
• Android Gradle Plugin Configuration: The android.nonFinalResIds property in gradle.properties was enabled by setting it to true, which is necessary for the AGP migration.
• ProGuard Rules: Placeholder consumer ProGuard rules files were added for the perpetual and referral feature modules (presents and viewmodels submodules).
• Base Image Tag Update: The reproducible/base_image_tag.txt file was updated to reflect the new base image date.
• File Removal: The package-lock.json file was removed from the repository.

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Changelog

• Dockerfile
  • Updated the Gradle base image version.
• features/perpetual/presents/consumer-rules.pro
  • Added a new file for consumer ProGuard rules.
• features/perpetual/viewmodels/consumer-rules.pro
  • Added a new file for consumer ProGuard rules.
• features/referral/presents/consumer-rules.pro
  • Added a new file for consumer ProGuard rules.
• features/referral/viewmodels/consumer-rules.pro
  • Added a new file for consumer ProGuard rules.
• gradle.properties
  • Enabled the android.nonFinalResIds flag.
• package-lock.json
  • Removed the file.
• reproducible/base_image_tag.txt
  • Updated the base image tag date.

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[gemini-code-assist]

Code Review

This pull request updates the Gradle base image to version 9.0.0, enables android.nonFinalResIds for compatibility with newer Android Gradle Plugin versions, and adds placeholder ProGuard consumer rules for several feature modules. The changes are logical and support the migration to AGP 9.x. I have one suggestion regarding a potential typo in a configuration file.