Merge "[User Switcher] Change copy for phone dialog." into tm-qpr-dev am: c55617e3 am: 4eb2e12f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20243800



Change-Id: I3472122cfe5e632d3cd7b3715fbb337118f959a0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>