OptionExclusive extension support.

[santosh-pingle]

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

Fixes #1281

Description

• Add option exclusive extension support in answerOption.
• On answer option exclusive click deselects other answer options.
• On answer option click deselects answer option exclusive.

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

Type
Choose one: Feature

Screenshots (if applicable)

Checklist

• I have read and acknowledged the Code of conduct.
• I have read the Contributing page.
• 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 demo app(s) to verify my change fixes the issue and/or does not break the demo app(s).

[codecov]

Codecov Report

Merging #1284 (4315965) into master (e35492b) will decrease coverage by 0.02%.
The diff coverage is 73.07%.

@@             Coverage Diff              @@
##             master    #1284      +/-   ##
============================================
- Coverage     84.19%   84.17%   -0.03%     
  Complexity      678      678              
============================================
  Files           147      147              
  Lines         10711    10735      +24     
  Branches        872      882      +10     
============================================
+ Hits           9018     9036      +18     
- Misses         1232     1233       +1     
- Partials        461      466       +5     

Impacted Files	Coverage Δ
...ogle/android/fhir/datacapture/MoreAnswerOptions.kt	69.23% <50.00%> (-16.49%)	⬇️
...QuestionnaireItemCheckBoxGroupViewHolderFactory.kt	72.82% <80.00%> (+2.55%)	⬆️

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