[camera_avfoundation] Implementation swift migration - part 13

[RobertOdrowaz]

Migrates camera implementation as part of flutter/flutter#119109

This PR migrates the last chunk of FLTCam class to Swift:

• updateOrientation
• setCaptureSessionPreset
• Removes FLTCam class

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[flutter-dashboard]

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[gemini-code-assist]

Code Review

This pull request successfully migrates the updateOrientation and setCaptureSessionPreset methods from Objective-C to Swift, and subsequently removes the now-obsolete FLTCam class. This is a great step forward in the Swift migration. The implementation looks solid, and I have a couple of minor suggestions to enhance code safety and adopt more idiomatic Swift patterns.

[hellohuanlin]

This is exciting!

[hellohuanlin]

Yay!

[RobertOdrowaz]

@hellohuanlin take a look at this PR again when you have a moment pls

[hellohuanlin]

LGTM

[auto-submit]

autosubmit label was removed for flutter/packages/9930, because The base commit of the PR is older than 7 days and can not be merged. Please merge the latest changes from the main into this branch and resubmit the PR.

[RobertOdrowaz]

Test exemption reason: refactors with no semantic change (e.g. null safety migrations)

[stuartmorgan-g]

test-exempt: code refactor with no semantic change

[stuartmorgan-g]

Sorry, this will require a merge to re-delete the deleted files; I just landed a mass change that slightly altered the license header of all code files in the repository, which is why there's a conflict here now.