Merge "Notify WMShell on aborting auto-enter-pip" into udc-dev am: 0c66b151e3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/23321279

Change-Id: I2ee9286b1c6dc5112a867f368e1ae462b7e20abe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>