[camera_android_camerax] Pass targetVideoEncodingBitRate to Recorder

[Anantha-Eswar]

This PR fixes an issue where the videoBitrate parameter configured in MediaSettings was ignored during video recording on Android using CameraX.

We now forward mediaSettings?.videoBitrate as the targetVideoEncodingBitRate when instantiating the CameraX Recorder instance in AndroidCameraCameraX.createCameraWithSettings.

Fixesflutter/flutter#179832

Pre-Review Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the AI contribution guidelines and understand my responsibilities, or I am not using AI tools.
• I read the Tree Hygiene page, which explains my responsibilities.
• I read and followed the relevant style guides and ran the auto-formatter.
• I signed the CLA.
• The title of the PR starts with the name of the package surrounded by square brackets, e.g. [shared_preferences]
• I linked to at least one issue that this PR fixes in the description above.
• I followed the version and CHANGELOG instructions, using semantic versioning and the repository CHANGELOG style, or I have commented below to indicate which documented exception this PR falls under.
• I updated/added any relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or I have commented below to indicate which test exemption this PR falls under.
• All existing and new tests are passing.

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[gemini-code-assist]

Code Review

This pull request updates the camera_android_camerax package to version 0.7.3, fixing an issue where the videoBitrate configuration was ignored during video recording. The Recorder is now instantiated with targetVideoEncodingBitRate mapped from mediaSettings?.videoBitrate, and unit tests have been updated to verify this configuration. There are no review comments, and I have no feedback to provide.

[camsim99]

LGTM thanks for this fix!!

[stuartmorgan-g]

@camsim99 Could you find a second reviewer for this on the Android team, since it's specific to the Android implementation package?