Merge "Implemented tracing of the user-switch event." into main am: 5f8d96ba60

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/3246671

Change-Id: Ie6b5605d7243d9780a3a193c9d9d2126372465fc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>