Merge "Fix back arrow behavior for remote-only sign-in flow" into udc-dev am: 3130e82a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22997105



Change-Id: I148c4c4daf986c4298b7193339d36f37735fa8a3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>