Import XML versions of compiled CQL Libraries

[vitorpamplona]

Is your feature request related to a problem? Please describe.
FHIR allows CQL Library makers to expose their libraries as complied ELM objects exported to JSON and XML. While JSON libraries can easily be imported with Jackson, the XML versions of the same libraries historically required JAXB to import. JAXB is not available on Android.

For example, the FHIR Helpers library is exposed as:

"resource": {
  "resourceType": "Library",
  "id": "library-FHIRHelpers-4.0.0",
  "version": "4.0.0",
  "name": "FHIRHelpers",
  "status": "active",
  "experimental": true,
  "type": {
    "coding": [
      {
        "system": "https://hl7.org/fhir/codesystem-library-type.html",
        "code": "logic-library"
      }
    ]
  },
  "content": [
    {
      "contentType": "application/elm+xml",
      "data": "Base64 Content"
    }
 ]
}

there the Base64 Content contains an XML version of the ELM encoded as Base64

Describe the solution you'd like
Remove JAXB dependencies to import and export ELM Libraries from the CQL Translator and use Jackson's XML Parser instead.

Describe alternatives you've considered
We have tested bringing JAXB libraries to Android, but Jackson seems to have a brighter future.

Additional context

Would you like to work on the issue?
Yes.

[vitorpamplona]

Fixed on #1603