Develop: Remove current speech to text and text to speech implementation and UI

[mdconatser]

As a disabled user, I want to use this application using my normal accessibility settings on my phone rather than having a different experience within the USPS application.

Acceptance Criteria

• UI elements and back-end functionality logic for voice input is removed
• Document any relevant content in the Programmer guide (draft thoughts of usage and importantly the "Why")
• Updates SRS and STP (and other docs if necessary)
• Add/Update relevant unit tests