For #12034 - Support reverse landscape orientation for fullscreen videos

[indurs]

This allows users to view the full screen video both in landscape and reverse landscape even when auto rotate option is disabled in device settings

earth.mp4

Pull Request checklist

• Quality: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
• Tests: This PR includes thorough tests or an explanation of why it does not
• Changelog: This PR includes a changelog entry or does not need one
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

After merge

• Milestone: Make sure issues closed by this pull request are added to the milestone of the version currently in development.
• Breaking Changes: If this is a breaking change, please push a draft PR on Reference Browser to address the breaking issues.

[Mugurell]

Seems like a test needs to be updated

 SUITE: mozilla.components.feature.media.fullscreen.MediaSessionFullscreenFeatureTest
   TEST: screen orientation is updated correctly
   FAILURE

 Argument(s) are different! Wanted:
 activity.setRequestedOrientation(11);
 -> at android.app.Activity.setRequestedOrientation(Activity.java)
 Actual invocations have different arguments:
 activity.setRequestedOrientation(6);
 -> at mozilla.components.feature.media.fullscreen.MediaSessionFullscreenFeature.processFullscreen(MediaSessionFullscreenFeature.kt:55)

[indurs]

Ok.. Thank You ! I will update the MediaSessionFullscreenFeatureTest

[Mugurell]

This looks good, thank you @indurs .
Can you please add a note in changelog.md about this change and then we can land this?

[indurs]

@Mugurell , I've updated the changelog.md