Revert "Frameworks: mutliwindow: notify split view if layout changed"

This reverts commit 7a95adf59b08380b3d8cdbccb38c8133a8050b90.
HALO notification should open in floating window mode

Change-Id: I9625bb505c78b361fcb618c7a3b23105568b8d5c
PS1: If HALO is activated all HALO notifications will open in floating window mode. If HALO is not activated notifications will open in mutiwimdow mode.
PS2: If HALO is activated "add to split view" in the recent application list will not be shown.
mutliwindow: notify split view if layout changed
Revert "mutliwindow: notify split view if layout changed"

This reverts commit ec081f33d9fbb202adbccbe61a65c74dfef2923d.