answer expression full, reference type, and choice column basic support

[maimoonak]

Fixes #1039

Description Implement answer expression support and example in datacapture, refereence field type and basic implementation of choice column

Type Choose one: Feature

Checklist

• [x] I have read and acknowledged the Code of conduct.
• [x] I have read the Contributing page.
• [x] I have signed the Google Individual CLA, or I am covered by my company's Corporate CLA.
• [x] I have discussed my proposed solution with code owners in the linked issue(s) and we have agreed upon the general approach.
• [x] I have run ./gradlew spotlessApply and ./gradlew spotlessCheck to check my code follows the style guide of this project.
• [x] I have run ./gradlew check and ./gradlew connectedCheck to test my changes locally.
• [x] 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).

[Tarun-Bhardwaj]

@aditya-07 , could you please review this PR?

[Tarun-Bhardwaj]

@maimoonak , is there an ETA by when we can merge this PR?

[aditya-07]

@maimoonak Should this PR be closed since its now split into two separate ones?

[maimoonak]

closing in favor of #1480