[camera] Remove OCMock from CameraExposureTests and CameraFocusTests

[mchudy]

Extracted from #8342 to keep PRs smaller

• Introduces FLTDeviceOrientationProviding and FLTCaptureDeviceControlling protocols
• Removes OCMock.h reference from CameraExposureTests.h and CameraFocusTests.h

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• I read the Contributor Guide and followed the process outlined there for submitting PRs.
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• I linked to at least one issue that this PR fixes in the description above.
• I updated pubspec.yaml with an appropriate new version according to the pub versioning philosophy, or this PR is exempt from version changes.
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• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is test-exempt.
• All existing and new tests are passing.

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[hellohuanlin]

Overall looks very good!

[hellohuanlin]

CC @LouiseHsu who recently did a pretty big swift migration for in-app purchase plugin.

[mchudy]

I'm not sure why the CI build fails. Locally it builds successfully. Do you have any tip maybe what can be the cause of this issue?

Failed to build iOS app
Lexical or Preprocessor Issue (Xcode): 'FLTCaptureDeviceControlling.h' file not found
/Volumes/Work/s/w/ir/x/w/packages/packages/camera/camera_avfoundation/ios/camera_avfoundation/Sources/camera_avfoundation/include/camera_avfoundation/FLTCamMediaSettingsAVWrapper.h:7:8

[hellohuanlin]

I'm not sure why the CI build fails. Locally it builds successfully. Do you have any tip maybe what can be the cause of this issue?

Failed to build iOS app
Lexical or Preprocessor Issue (Xcode): 'FLTCaptureDeviceControlling.h' file not found
/Volumes/Work/s/w/ir/x/w/packages/packages/camera/camera_avfoundation/ios/camera_avfoundation/Sources/camera_avfoundation/include/camera_avfoundation/FLTCamMediaSettingsAVWrapper.h:7:8

it's been a while since i touched this, but it sounds like either module map or umbrella header. I'd look into a similar header and see how it is setup.

[hellohuanlin]

I don't find a 2nd reviewer from the CODEOWNER for this plugin. Maybe @LouiseHsu who recently did a similar swift migration?

[mchudy]

I fixed the CI, kind of a workaround (for some reason I cannot get this to work with subfolders). I'm gonna try to fix that in further PRs, but I don't want to block this one.