Merge "Notifies All Apps header when profile tab switches." into tm-qpr-dev am: a2e9ce3b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/19225205



Change-Id: I4e6c7539d7863b02f62f6210095de5a848d77a54
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>