fix(voice): Force NCCO actions to set value for NCCO type to avoid JS problems

[dragonmantank]

Description

When serializing an NCCO to a JS object, set the action to a static value instead of relying on the object's this.action property.

Motivation and Context

When making the JS Object serializations, using action: this.action to generate the resulting objects would always result in a blank value. This seems to work fine on some versions of node, for the unit tests, and in TS, but when running in a pure JS environment the resulting value was blank. Since NCCOs have a static action value based on their type, this just sets the value directly during deserialization.

Testing Details

Unit tests, as well as manual testing to help build the patch.

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

Merging #853 (d98c7f6) into 3.x (f04c595) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              3.x     #853   +/-   ##
=======================================
  Coverage   83.42%   83.42%           
=======================================
  Files         119      119           
  Lines        1484     1484           
  Branches      283      283           
=======================================
  Hits         1238     1238           
  Misses        245      245           
  Partials        1        1           

Files Changed	Coverage Δ
packages/voice/lib/classes/NCCO/Connect.ts	0.00% <ø> (ø)
packages/voice/lib/classes/NCCO/Conversation.ts	61.76% <ø> (ø)
packages/voice/lib/classes/NCCO/Record.ts	0.00% <ø> (ø)
packages/voice/lib/classes/NCCO/Stream.ts	0.00% <ø> (ø)

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