Merge "[qrcode] Open any available camera if back camera isn't available."...

Merge "[qrcode] Open any available camera if back camera isn't available." into rvc-dev am: 8776749e am: d6b68cb3 am: 8917715f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/12006805

Change-Id: I2f1bdd4b0bf84c11349da6f234ffca9ae9874b70