Handle empty repeated group header.

[santosh-pingle]

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

Fixes #726

Description
In paginated layout, empty repeated group header was shown.

issue :
It was creating empty answer component for repeated group item while packing repeated group header.
fix :

1. do not create empty response item component for repeated group header.
2. do not filter empty answer component for repeated group

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

Type
Choose one: (Bug fix)

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).

[santosh-pingle]

Screen.Recording.2024-06-18.at.4.35.58.PM.mov

[jingtang10]

thanks @santosh-pingle for this

i think we can merge this to fix the issue at hand, but i'd like to triage the usage of the function createQuestionnaireResponseItem