Update logic to cover all the drop target cases in Launcher

Made change that will pass raw drag zone enter events to the Launcher
process.

This will enable launcher to:

- Show pin view if there are no bubbles (no bubble bar present)
- Set bubble showing drop target
- Animate bubble bar location if there are bubbles
- Stash / un-stash the bubble bar if there are bubbles

Test: DragToBubblesZoneChangeListenerTest, DragToBubbleControllerTest
Bug: 411505605
Flag: com.android.wm.shell.enable_create_any_bubble
Change-Id: I1959135d36eaa15fa09497921bddddefef53520c