Merge "Make user switching dialog cover top part of the screen as well." into...

Merge "Make user switching dialog cover top part of the screen as well." into udc-dev am: 72e4b7e0 am: c919a7e4 am: 427d580b am: 8bde7a59

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23639284



Change-Id: Ie35a2a4043f997435f43d5487266764c87fa4169
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>