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

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

Change-Id: I0e614ceae85cc87efc4e26a4d8a277b52b582fb6