fix(video): Added SIP and DTMF playing

[dragonmantank]

Description

Adds SIP and DTMF dialing into the Video SDK

Motivation and Context

This feature has been verified for the integration upgrade, so adding it to the SDK

Testing Details

Unit tests

Example Output or 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

• 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.