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: ba1e9c30 am: ac7e62af am: 797a0ccb

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

Change-Id: I553fbfa303bf0a2e32f26291245ba31d10d54231