Moved the NpmPackage dependency for structure-map based resource extraction.

[aditya-07]

IMPORTANT: All PRs must be linked to an issue (except for extremely trivial and straightforward changes).

Fixes #808

Description
Moved the NpmPackage dependency for structure-map based resource extraction action down from datacapture library to the client apps. Now the onus is on the client apps to load the NpmPackage with all the resources that maybe required by the structure-map.

This has reduced the size of our Reference App from 48.8 MB to 35.6 MB, packages.fhir.org-hl7.fhir.r4.core-4.0.1.tgz being 12.8MB.
Alternative(s) considered
No

Type
Choose one: Code health

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Checklist

• I have read and acknowledged the Code of conduct
• I have read How to Contribute
• I have read the Developer's guide
• I have signed the Google Individual CLA, or I am covered by my company's Corporate CLA
• I have discussed my proposed solution with code owners in the linked issue(s) and we have agreed upon the general approach
• I have run ./gradlew spotlessApply and ./gradlew spotlessCheck to check my code follows the style guide of this project
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• I have built and run the reference app(s) to verify my change fixes the issue and/or does not break the reference app(s)

[jingtang10]

thanks @aditya-07

@ekigamba FYI - we needed to remove the npm package because it bloats the library. but if the client does need to load a custom npm package they can provide it using the config. and that's a functionality (e.g. TarGzipUtility.kt and NpmPackageProvider.kt) that may well exist in fhir core lib. @pld FYI as well.

[jingtang10]

btw - have you noticed the size decrease before vs after this PR :) can you share the difference?

[jingtang10]

btw - have you noticed the size decrease before vs after this PR :) can you share the difference?

it's already in the pr description. thanks for pointing out.

[codecov]

Codecov Report

Merging #844 (db82cd2) into master (7323e5c) will increase coverage by 0.17%.
The diff coverage is 70.00%.

@@             Coverage Diff              @@
##             master     #844      +/-   ##
============================================
+ Coverage     33.36%   33.53%   +0.17%     
+ Complexity      458      457       -1     
============================================
  Files           108      105       -3     
  Lines          9033     8981      -52     
  Branches        560      552       -8     
============================================
- Hits           3014     3012       -2     
+ Misses         5732     5684      -48     
+ Partials        287      285       -2     

Impacted Files	Coverage Δ
...ogle/android/fhir/datacapture/DataCaptureConfig.kt	75.00% <66.66%> (-25.00%)	⬇️
...android/fhir/datacapture/mapping/ResourceMapper.kt	80.90% <71.42%> (-0.10%)	⬇️

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