Changes to support GRPC changes.

[td202]

Purpose

Update the client for compatibility with the version 7 API changes.

Changes

• Update the FromProto instances to account for:
  • Presence of cooldowns and available amount in AccountInfo.
  • Refactoring of PoolStatus into BakerPoolStatus and PassiveDelegationStatus.
  • Refactoring ActiveBakerPoolStatus as optional in BakerPoolStatus.

Checklist

• My code follows the style of this project.
• The code compiles without warnings.
• I have performed a self-review of the changes.
• I have documented my code, in particular the intent of the
  hard-to-understand areas.
• (If necessary) I have updated the CHANGELOG.