[Bug]: Text inside NiaBackground has wrong colors in some cases

[JoseAlcerreca]

Is there an existing issue for this?

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What happened?

As seen in https://github.com/android/nowinandroid/issues/917, some NiaBackground screenshots don't show any text or they show it with very low contrast.

Chatted with @alexvanyo about this:

I wonder if we need to manually set the contentColor in the Surface - I think the default behavior is it tries to determine it from the background color, but maybe it doesn't work with our custom ones?

Relevant logcat output

No response

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