Handle contingency settings state on remote config

[Bunn]

Task/Issue URL: https://app.asana.com/0/0/1207976963085129/f
Tech Design URL:
CC:

Description:
Display DuckPlayer contingency message and disable settings if necessary

Steps to test this PR:

1. Use https://jsonblob.com/api/1269938997861146624 config URL (URL set, Feature ON)
2. Check if DuckPlayer works (it should), and that the contingency message is not shown
3. Check that Duck Player settings is not disabled

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1. Use https://jsonblob.com/api/1269944115209822208 config URL (URL set, Feature OFF)
2. Check if DuckPlayer works (it shouldn't) and that the contingency message is shown
3. Click on Learn More, check that this link opens
4. Check that Duck Player settings is disabled

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1. Use https://jsonblob.com/api/1269953336848539648 config URL (URL not set, Feature OFF)
2. Check if DuckPlayer works (it shouldn't) and that the contingency message is not shown.

[afterxleep]

LGTM, this is what I see