Previously, when an iOS device oriented UIDeviceOrientationFaceUp or UIDeviceOrientationFaceDown the camera plugin would map this to a default "portrait" orientation. The means when the device is in landscape and is rotated flat, the camera unexpectedly flips to portrait.

Video of bug: https://www.youtube.com/watch?v=cZI4M9GCm8E

1. Ignore UIDeviceOrientationFaceUp and UIDeviceOrientationFaceDown to keep the previous portrait or landscape orientation.
2. Replace the now-redundant CameraPluginTests module test with a CameraOrientationTests. Validated this tests fails on master, but passes on this PR.
3. Remove stray DevelopmentTeam build settings.

Fixes flutter/flutter#83861

Pre-launch Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
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• The title of the PR starts with the name of the plugin surrounded by square brackets, e.g. [shared_preferences]
• I listed 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].
• I updated CHANGELOG.md to add a description of the change.
• I updated/added relevant documentation (doc comments with ///).
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