Default camera lens uses ultra-wide instead of main camera

[GeneralK1ng]

When using QrScanner, the default camera lens on Android selects the ultra-wide camera.
This results in low resolution and poor QR code detection performance.

Expected behavior

• The scanner should default to the main (back) camera, or
• Provide an option to let developers choose which physical camera (e.g. main, ultra-wide, telephoto) to use.

Why this matters

Ultra-wide cameras usually have lower resolution, which makes scanning QR codes less reliable.
Most QR scanner apps default to the main camera for better clarity and accuracy.

Steps to reproduce

• Initialize QrScanner with default parameters.
• On devices with multiple back cameras, the scanner opens the ultra-wide camera.

Environment

• Library version: 3.1.2
• Device: OnePlus PKG110
• OS: Android 15