Compensate for incorrect camera orientation on affected iOS and Android devices

[kaustuvpokharel]

On some iOS and Android devices, Qt Multimedia's produces wrong orientation when the device is held in landscape.

This PR introduces a CameraOrientationNormalizer object that lives inside the camera's capture loader and handles two things-

Preview correction: Computes a previewRotation value bound to VideoOutput.orientation. On iOS (where correctionAngle() returns 0, consistent with Qt's documentation noting the correction angle is non-zero mostly on Android), it applies 180° in landscape to compensate for the AVFoundation inversion

Captured image normalization: At shutter press, the current screen orientation is recorded. When the JPEG is saved, normalizeImageOrientation() compares the pixel dimensions against the recorded orientation, if the user captured in landscape but the pixels are portrait (or vice versa), it rotates them. Any non-identity EXIF tag is stripped by re-saving with EXIF reset to identity. If everything already matches, the file is not touched. The corrected image is then shown as the photo preview, so the user sees the right orientation before accepting.

On devices where the backend already produces correct output, previewRotation is 0 in portrait (no change) and the image normalization returns false without modifying the file, should not regression.

Video capture orientation is not addressed. The MediaRecorder receives frames directly from the capture session's internal pipeline, not from the VideoOutput, so the orientation property does not affect recorded video.

THIS NEEDS TESTING ON FEW DEVICES

[qfield-fairy]

🍎 MacOS DMG universal builds

Download a MacOS DMG universal build of this PR for testing.
(Built from commit 61481e1)

📱 Android builds

Download an Android arm64 build of this PR for testing.
(Built from commit 61481e1)

Other Android architectures

• arm-neon
• x64
• x86
• all access arm64
• all access arm-neon
• all access x64
• all access x86

🪟 Windows builds

Download a Windows build of this PR for testing and for arm64.

(Built from commit 61481e1)

🐧 Linux AppImage builds

Download a Linux AppImage build of this PR for testing.
(Built from commit 61481e1)

[nirvn]

@kaustuvpokharel , as per our discussion, can we narrow the code down to only apply to iOS and Windows OSes? I'll then send the iOS build to a local tester here to increase nb of devices tested.