Fix parsing issue, add support for DotLottieConfiguration in SwiftUI LottieView

[calda]

This PR fixes two issues:

1. Fixes #2269
2. Fixes #2228

For #2269, we were failing to parse the animation. It's missing some fields that iOS requires, but that web doesn't require. We can relax the parsing a bit to allow this animation to parse successfully.

When testing the animation after fixing the parsing issue, I ran in to #2228. I bundled that animation and its image assets in a dotLottie file, but it was completely blank because the DotLottieConfiguration.imageProvider was being ignored.

Before #2269	Before fixing #2228	After

[emerge-tools[bot]]

1 build increased size

Name	Version	Download	Change	Install	Change
SizeTest com.airbnb.lottie.sizetest.iOS	1.0 (1)	752.5 kB	⬆️ 5.9 kB (0.79%)	2.3 MB	⬆️ 20.4 kB (0.93%)

SizeTest 1.0 (1)
com.airbnb.lottie.sizetest.iOS

⚖️ Compare build ⏱️ Analyze build performance

Total install size change: ⬆️ 20.4 kB (0.93%) Total download size change: ⬆️ 5.9 kB (0.79%)

Largest size changes

Item	Install Size Change
📝 Lottie.Dictionary.value(for,file,line)	⬆️ 8.2 kB
🗑 Lottie.Dictionary.value(for)	⬇️ -7.2 kB
Strings.Swift File Paths	⬆️ 4.4 kB
📝 Lottie.LottieView.applyCurrentAnimationConfiguration(to)	⬆️ 1.9 kB
DYLD.Fixups	⬆️ 1.3 kB

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