Merge "New string variations for the sign-in title." into udc-dev am: 35d790f0 am: cf6411b7 am: 761bd114

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23001179



Change-Id: I57d7906e3d377feae624d6fb8f7e154426ad98c6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>