Improved styling the Form end screen

[grzesiek2010]

Closes #5570

What has been done to verify that this works as intended?

I've verified implemented changes manually:

Why is this the best possible solution? Were any other approaches considered?

This is what we discussed during our Friday call.

How does this change affect users? Describe intentional changes to behavior and behavior that could have accidentally been affected by code changes. In other words, what are the regression risks?

I think it doesn't require testing.

Do we need any specific form for testing your changes? If so, please attach one.

No.

Does this change require updates to documentation? If so, please file an issue here and include the link below.

No.

Before submitting this PR, please make sure you have:

• run ./gradlew checkAll and confirmed all checks still pass OR confirm CircleCI build passes and run ./gradlew connectedDebugAndroidTest locally.
• verified that any code or assets from external sources are properly credited in comments and/or in the about file.
• verified that any new UI elements use theme colors. UI Components Style guidelines

[seadowg]

@alyblenkin I'll send you a build on Slack

[alyblenkin]

Hey @grzesiek2010 @seadowg. The last screen is looking good. The only thing is the background of the message is a bit dark. I was hoping we could do an opacity of the primary colour. I mocked it up with 10% opacity; however, that might be a little too light, so we should go with 15% opacity.

[seadowg]

@alyblenkin @grzesiek2010 maybe it makes sense for us to use a low emphasis version of our Primary color as the "Surface Container High" Material 3 color that "Filled" Cards (which this looks most like) use. That seems to fit with the default Material theme - Surface Container High looks like a faded version of their Primary. @grzesiek2010 it looks like that's another unreleased attribute, so we'd need to define it in attrs.xml until they release the new Material Components with the rest of the Material 3 colors.

[grzesiek2010]

@seadowg and then change cardBackgroundColor which defines what color is used as a background?

[seadowg]

@grzesiek2010 Yeah I think that's right

[grzesiek2010]

Ok It's ready. The new color compared to the old one:

Now	Before