[camera] Adds support for video stabilization

[ruicraveiro]

Implements getSupportedVideoStabilizationModes() and setVideoStabilizationMode() methods in CameraController.

Address issue flutter/flutter#89525.
It is the camera sub-PR for #7108.

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[gemini-code-assist]

Code Review

This pull request introduces support for video stabilization by adding getSupportedVideoStabilizationModes() and setVideoStabilizationMode() to the CameraController. The implementation includes updating CameraValue to store the current stabilization mode and providing comprehensive unit tests for the new functionality. The changes are well-structured and thoroughly tested. I have a couple of minor suggestions for improvement.

[stuartmorgan-g]

@ruicraveiro Is this just the remainder of #7108 ? If so, you can just resolve the main PR to only include this part, and we can use that existing PR for the last package rather than having a new PR with new reviews.

[ruicraveiro]

@ruicraveiro Is this just the remainder of #7108 ? If so, you can just resolve the main PR to only include this part, and we can use that existing PR for the last package rather than having a new PR with new reviews.

Ah!!! It is! :-) OK, I will do that as soon as I'm able to.

[ruicraveiro]

BTW, maybe I can just force push the branch to that issue PR, can't I?

[stuartmorgan-g]

That should work (although it will mean we won't be able to easily see that the app-facing package code hasn't changed since the last review if you force-push, due to how GitHub differential reviews work).

[ruicraveiro]

OK, to make your life easier, I have just rebased the 2 commits originally in PR 7108 on top of main and I'm adding a 3rd commit with what changed in the meantime. The only meaningful changes that I made were:

I had the comment in this field incomplete:

-  /// The video stabilization mode in
+  /// The current video stabilization mode.
   final VideoStabilizationMode videoStabilizationMode;

This message was still referring to the old name of the method before we refactored it:

-    _throwIfNotInitialized('isVideoStabilizationModeSupported');
+    _throwIfNotInitialized('getSupportedVideoStabilizationModes');

Everything else is a result of dart format (edit: and dart analyze) behaving differently between then and now.