Enable drag from app handle on foldables

On devices without desktop, enable drag from app handle.
When dragging, default to no change in app running mode (fullscreen
stays fullscreen by default etc).

Bug: 388851898
Test: atest WMShellUnitTests:DesktopModeVisualIndicatorTest
Flag: com.android.wm.shell.enable_bubble_to_fullscreen
Change-Id: Ib1b5e9f4363f8f0791ae853f176fb1dbf8947750