Fixing rounded corners for IAMs

[emawby]

Description

One Line Summary

Fixing rounded corners for IAMs.

Details

cardViews have their own custom background where corner radius is applied. By setting the backgroundColor you remove the custom background and replace it with a new one that has the new color. To avoid this we should be using the setCardBackgroundColor instead. This changes the color on the custom background instead of replacing it.

Background context

This bug was initially introduced when we set the cardView's background to transparent to enable transparent IAMs.

Affected code checklist

• Notifications
  • Display
  • Open
  • Push Processing
  • Confirm Deliveries
• Outcomes
• Sessions
• In-App Messaging
• REST API requests
• Public API changes

Checklist

Overview

• I have filled out all REQUIRED sections above
• PR does one thing
  • If it is hard to explain how any codes changes are related to each other then it most likely needs to be more than one PR
• Any Public API changes are explained in the PR details and conform to existing APIs

Testing

We don't currently have a way to visually unit test IAMs for details like rounded corners

• I have included test coverage for these changes, or explained why they are not needed
• All automated tests pass, or I explained why that is not possible
• I have personally tested this on my device, or explained why that is not possible

Final pass

• Code is as readable as possible.
  • Simplify with less code, followed by splitting up code into well named functions and variables, followed by adding comments to the code.
• I have reviewed this PR myself, ensuring it meets each checklist item

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This change is 

[jkasten2]

Change looks good to me. Would be nice to have a before and after screenshot since this is a visual fix.

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @Jeasmine and @nan-li)