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

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

Change-Id: Id96ff4092b01f68de14c859461e2cf82717694c8