Merge "Send client relaunch event to WMCore." into tm-dev am: a688a749 am: 79b31eda

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18367863



Change-Id: I925335c03de00c7f190461647f393dedde9d570d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>