misc: Adding missing Whatsapp usage categories

[dcanonmolina]

Fixes

Adding missing usage categories for Whatsapp Business API https://github.com/twilio/twilio-java/issues/703

The categories are: CHANNELS-WHATSAPP-OUTBOUND CHANNELS-WHATSAPP-INBOUND CHANNELS-MESSAGING-INBOUND CHANNELS-MESSAGING-OUBOUND https://www.twilio.com/docs/usage/api/usage-record#usage-whatsapp

Checklist

• [x] I acknowledge that all my contributions will be made under the project's license
• [x] I have made a material change to the repo (functionality, testing, spelling, grammar)
• [x] I have read the Contribution Guidelines and my PR follows them
• [x] I have titled the PR appropriately
• [x] I have updated my branch with the main branch
• [x] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added the necessary documentation about the functionality in the appropriate .md file
• [ ] I have added inline documentation to the code I modified

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