Merge "[Partial Screensharing] Rename start button id" into udc-dev am: 4a2870ce

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22597857



Change-Id: I6345d3156037100389640ab53b279e15a5f0cb64
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>