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: 3de3fa1f am: a75d3776

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

Change-Id: Ib195752bff13c1bfeb819c638dfa4af744c81daa