Picture aspect ratio depends on phone screen size

• I have searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• I have read https://github.com/signalapp/Signal-Android/wiki/Submitting-useful-bug-reports
• This isn't a feature request or a discussion topic

Bug description

When taking a photo, a lot of content is cropped from the picture. Specifically on horizontal mode, the picture is quite narrow.
Problems:

• This is in generally inconvenient, unnecessarily cropped images = lost information.
• This might leak information about the device aspect ratio.

Steps to reproduce

• In a chat conversation I start the add picture from camera function

• I hold the phone horizontally
  Actual result:
• The preview is over the whole phone screen, the aspect ratio is quite narrow

• I hold the phone is vertically
  Actual result:
• The preview is not over the whole phone screen, there is a black bar on the right (=bottom of the phone if held vertically), but still not the actual aspect ratio of the camera (4:3)

Expected result:

• The preview is exactly the size of the camera aspect ratio, with a black bar to fill the rest.

Device info

Device: Google Pixel 6 Pro
Android version: 12 (SQ1D.220205.004)
Signal version: 5.32.7

<! --### Link to debug log -->

Maybe somewhat related to https://github.com/signalapp/Signal-Android/issues/8292 and it's many "reopen" issues...

Start by reproducing the issue through the chat conversation's add-picture-from-camera flow on the reported Pixel 6 Pro and Android 12 setup, then trace how the camera preview is sized in each orientation. Done means the preview preserves the camera's 4:3 aspect ratio in both orientations and uses black bars instead of cropping content.