Split from home animation needs to originate from the app icon instead of the menu item icon. This can be useful for other animations in the future.
Bug: 226395821
Test: N/A
Change-Id: If45d80e347ba275bd550b6acd6ad81b319e753a3
Implements the ability to split the screen by long-pressing a Taskbar icon.
Bug: 217964720
Test: Manual
Change-Id: I5d324d8ca912c10cc3c3de21cae98fad546b85ac