[camera] give computeBestCaptureSize option

[pedrocar]

I have been trying to take photos with maximum resolution with the flutter camera plugin. however, the resolution of the captured images does never have the best capture size available through Camera2 API, independently of the ResolutionPreset parameter.

Looking at the code I found that the capture size is always using the best CamcorderProfile for ResolutionPreset

packages/camera/android/src/main/java/io/flutter/plugins/camera/Camera.java

recordingProfile = CameraUtils.getBestAvailableCamcorderProfileForResolutionPreset(cameraName, preset);
captureSize = new Size(recordingProfile.videoFrameWidth, recordingProfile.videoFrameHeight);
previewSize = computeBestPreviewSize(cameraName, preset);

The capture size should be the best available resolution for capturing image, like this:

captureSize = CameraUtils.computeBestCaptureSize(streamConfigurationMap);

Or give the plugin an option to select a resolution for the capture. Actually, the "computeBestCaptureSize" is implemented but never used in the current version of camera plugin.