Merge "Fix low contrast text in add user dialog." into udc-dev am: 59ecd6a40a am: e60a8778b7 am: b01cff6f91

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23450544

Change-Id: I355413f98b1bd409d6d1ff9aacff62094d2b0aa5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>