feat: allow for providing safe area provider props

[jkdowdle]

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[coveralls]

Pull Request Test Coverage Report for Build 7805043023

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 85.099%

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Totals
Change from base Build 7718841149:	0.0%
Covered Lines:	3662
Relevant Lines:	4181

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💛 - Coveralls

[aecorredor]

Curious, why did we need this in the FL app?

[sternetj]

Looks good. Where we not able to just modify the theme we pass via the DeveloperConfigProvider to update the navigator's theme?

[jkdowdle]

Looks good. Where we not able to just modify the theme we pass via the DeveloperConfigProvider to update the navigator's theme?

I think I may have made a mistake. I assumed it was wrong for the themed navigation because the Theme types are incompatible between the two. But they have a lot of overlap at least for my purposes. I think I'll back out of that change

@sternetj you're right, we can just change the value in our passed theme

[jkdowdle]

@aecorredor @sternetj sorry for the force push, but I think the change set will now be more straight forward. Just the safe area props, nothing with the navigation