feat(rc): Support Remote Config managed value types (#1164)

[ashish-kothari]

Update Remote Config API to support managed value types

Added support for Rollouts, Experiments, and Personalization value types in the Remote Config API.

• Updated ParameterValue to include RolloutValue, PersonalizationValue, and ExperimentValue subclasses.
• Added factory methods ofRollout, ofPersonalization, and ofExperiment to ParameterValue.
• Updated TemplateResponse to parse rolloutValue, personalizationValue, and experimentValue fields from the backend response.
• Added unit tests for the new value types.
• Fixes Remote config publishTemplate override running rollouts #1092

[gemini-code-assist]

Summary of Changes

Hello @ashish-kothari, 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 significantly enhances the Firebase Remote Config API by introducing support for advanced managed value types. This change enables the system to handle more complex configuration scenarios, such as A/B testing, phased rollouts, and personalized content delivery, directly through the Remote Config parameters. The modifications involve extending existing data structures and parsing logic to accommodate these new capabilities.

Highlights

• Support for Managed Value Types: The Remote Config API now supports managed value types, specifically Rollouts, Experiments, and Personalization, allowing for more dynamic configuration management.
• ParameterValue Enhancements: The ParameterValue class has been updated to include new subclasses (RolloutValue, PersonalizationValue, ExperimentValue) and corresponding factory methods (ofRollout, ofPersonalization, ofExperiment) for creating these new types.
• Template Response Parsing: The TemplateResponse class has been modified to correctly parse rolloutValue, personalizationValue, and experimentValue fields received from the backend.
• Comprehensive Unit Tests: New unit tests have been added across various classes to ensure the correct creation, parsing, and equality checks for the newly introduced managed value types.

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[gemini-code-assist]

Code Review

This pull request introduces support for managed value types (Rollouts, Experiments, and Personalization) in the Remote Config API. The changes are well-structured, adding new subclasses to ParameterValue, corresponding factory methods, and updating TemplateResponse to handle the new types from the backend. The unit tests are also updated to cover these new features. My review includes a critical fix for a potential JSON parsing issue due to a mismatched @Key annotation, suggestions to improve code conciseness using Java Streams, and a naming suggestion to enhance API consistency.