fix: samsungpay script mount condition correction

[aritro2002]

Type of Change

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

Description

The Samsung Pay script should be mounted only when Samsung Pay is present and the script is not already mounted. Previously, we only checked whether it was mounted.

How did you test it?

I tested by running it in demo store.

Checklist

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

[semanticdiff-com[bot]]

Review changes with  

[PritishBudhiraja]

Closing this PR will discuss more on priority how can we improve this