X-EXC-SDK support for Target requests

[swarna04]

Description

The X-EXC-SDK header will contain SDK info in the format AdobeTargetMobile-iOS<-wrapper-friendly-name> e.g. AdobeTargetMobile-iOS, AdobeTargetMobile-iOS-Flutter etc

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] I have signed the Adobe Open Source CLA.
• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.