Move MoreTypes code to common module.

[santosh-pingle]

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

Description

1. Merge validation/MoreTypes and MoreTypes files which are present in sdc library and move it to common module.
2. Move respective tests to common module.

Alternative(s) considered
Have you considered any alternatives? And if so, why have you chosen the approach in this PR?

Type
Choose one: Code health

Screenshots (if applicable)

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
• I have run ./gradlew check and ./gradlew connectedCheck to test my changes locally
• 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)

[codecov]

Codecov Report

Merging #923 (12f57eb) into master (0f3ae42) will decrease coverage by 0.21%.
The diff coverage is 80.00%.

@@             Coverage Diff              @@
##             master     #923      +/-   ##
============================================
- Coverage     88.59%   88.38%   -0.22%     
  Complexity      464      464              
============================================
  Files           106      106              
  Lines          9043     9056      +13     
  Branches        561      561              
============================================
- Hits           8012     8004       -8     
- Misses          743      761      +18     
- Partials        288      291       +3     

Impacted Files	Coverage Δ
...fhir/datacapture/enablement/EnablementEvaluator.kt	73.68% <ø> (ø)
...acapture/validation/MaxValueConstraintValidator.kt	100.00% <ø> (ø)
...acapture/validation/MinValueConstraintValidator.kt	100.00% <ø> (ø)
...src/main/java/com/google/android/fhir/MoreTypes.kt	67.85% <80.00%> (ø)
...main/java/com/google/android/fhir/UnitConverter.kt	0.00% <0.00%> (ø)

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[jingtang10]

thanks @santosh-pingle - as discussed offline, can you just add the common module to the coverage report in the ci.yml file?

[santosh-pingle]

thanks @santosh-pingle - as discussed offline, can you just add the common module to the coverage report in the ci.yml file?

done.