JSON fields working on nested cards not working on individual report cards

[mahalakshme]

Need:

• Before React Native upgrade in the webapp, we were able to mention the hexcode value for report card colors
• No for nested report card types we support JSON fields like cardName, cardColor, textColor etc.,

AC:

Support the above JSON fields for cards that are of not nested type as well.

Reference:

Refer readme to understand the utility of the above fields.