[camera_android_camerax] Fix camera preview rotation for landscape oriented devices

[camsim99]

Fixes the incorrect camera preview rotation on landscape-oriented devices (like some tablets). Really, this PR generalizes the fix added in #8629 for correcting the camera preview rotation by correcting the camera preview rotation according to the rotation from the natural device orientation instead of assuming the device is naturally oriented in portrait up.

There are technically two different fixes in this PR; here's the breakdown for clarity:

1. For devices using the SurfaceTexture Impeller backend: Rotate the camera preview according to the current default display rotation (the rotation away from the natural device orientation) and ignore rotation added in CameraPreview widget completely (as it assumes the natural device orientation to be portrait up).
2. For devices using the ImageReader Impeller backend: Rotate the camera preview according to https://developer.android.com/media/camera/camera2/camera-preview#orientation_calculation, where deviceOrientationDegrees comes from a call to get the current default display rotation (the rotation away from the natural device orientation) instead of assuming it to be the rotation degrees from portrait up.

Fixes flutter/flutter#164493.*

*Seems to work on all physical devices I test, but not emulator with ImageReader Impeller backend. I think that is an emulator bug.

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