[SystemUI] Add notification to window feature.

Start apps intent through notification drag and drop.

When user click the notification, its app activity was launched as a new task,
but through this notification to window feature, user can launch app activity to popup(or split) window.

Test: When get a HeadsUp notification > Long press it > open GUTS > drag beyond threshold
Test:    > start drag and drop > launch app as popup or split.
Test: Open quick panel > long press any notification > open GUTS > drag beyond threshold
Test:    > start drag and drop > launch app as popup or split.

Design doc : https://docs.google.com/document/d/1nr1-Wj3DLvOMZGP8X6hCekk7pbB2furvHML-gYormdc/edit?ts=6090accb#heading=h.1t3h5sf



Bug: b/187095469

Signed-off-by: e.min <e.min@samsung.com>
Change-Id: Id7cd114e1afb7f484a4fa3db615a82d92d01a645
Merged-In: Id7cd114e1afb7f484a4fa3db615a82d92d01a645