feat: tax calculation in google pay

[ImSagnik007]

Type of Change

• [ ] Bugfix
• [x] New feature
• [ ] Enhancement
• [ ] Refactoring
• [ ] Dependency updates
• [ ] Documentation
• [ ] CI/CD

Description

Added tax calculation support in google pay wallet, based on shipping address.

How did you test it?

Checklist

• [x] I ran npm run re:build
• [x] I reviewed submitted code
• [x] I added unit tests for my changes where possible

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