feat: added RCS channel and changes to other channels

[manchuck]

Description

Adding the RCS Channel and syncing up MMS and SMS Channels

Motivation and Context

Testing Details

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.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.52%. Comparing base (e12c0d0) to head (a443216). Report is 17 commits behind head on 3.x.

:exclamation: Current head a443216 differs from pull request most recent head 5a6a224

Please upload reports for the commit 5a6a224 to get more accurate results.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 3.x #941 +/- ## ========================================== + Coverage 84.36% 84.52% +0.15% ========================================== Files 122 130 +8 Lines 1797 1867 +70 Branches 375 382 +7 ========================================== + Hits 1516 1578 +62 - Misses 281 289 +8 ```

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