Catalog app, implement single choice workflow.

[santosh-pingle]

Is your feature request related to a problem? Please describe.

1. User click on single choice component.
2. It launches single choice screen with questionnaire, which demonstrate single choice uses.
3. click on navigation back key in action bar, it takes user back on landing page.

Design single choice questionnaire json.
Write api to fetch single choice questionnaire json file name.
Apply custom style at application side.

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[santosh-pingle]

Datacapture, custom style does not get applied to the single choice options.
#1007

[varunkuar8789]

Lebal