Fixes to Preview and AnalysisImage resolution selection, aspect ratio and convertFromImage

[Almie]

Description

• Updated resolution selection in CameraX from the deprecated setTargetAspectRatio/setTargetResolution to setResolutionSelector
  • This fixes a bug where the incorrect resolution for ImageAnalysis would be selected because setTargetResolution expected a flipped X/Y input.
  • ImageAnalysis now picks a resolution matching the aspect ratio of the preview if possible
  • TODO: Since 1:1 aspect ratio is not directly supported by CameraX, a ResolutionFilter is needed to force a 1:1 aspect ratio when selected.
• Fixed previewAlignment not working correctly as well as AnimatedPreviewFit not animating correctly on aspect ratio changes
  • Preview.offset is now calculated as offset coordinates of the preview on screen, taking the alignment into account, which helps calculate Preview.convertToImage correctly
• Fixed Preview.convertToImage function now correctly converts point coordinates from AnalysisImage to Preview
• preview_overlay_example and ai_analysis_faces now work correctly on Android with the right positioning of the overlay elements

fixes #491
fixes #475

Checklist

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• 📕 I read the Contributing page.
• 🤝 I match the actual coding style.
• ✅ I ran flutter analyze without any issues.

Breaking Change

• 🛠 My feature contain breaking change.

If your feature break something, please detail it

[lilran14]

I am also experiencing this bug. Some devices are producing incorrect coordinates.
When can this be merged into the master? 🤔