Support bubble to fullscreen in onTaskMovedToFront.

This change modifies BubbleTaskStackListener to correctly handle
scenarios where a bubbled application, currently in a collapsed state,
is moved to the front and its windowing mode becomes fullscreen.

Previously, when a bubbled app's task moved to the front and entered
fullscreen (e.g., via a launcher shortcut), the bubble would not
properly transition to a fullscreen state. This fix addresses that by
invoking moveCollapsedInStackBubbleToFullscreen within the
onTaskMovedToFront callback. This ensures that the bubble is correctly
dissolved and the app is displayed in fullscreen, providing a seamless
user experience.

Bug: 389810202
Flag: EXEMPT bug fix
Test: atest WMShellRobolectricTests:BubbleTaskStackListenerTest
Test: atest WMShellMultivalentTestsOnDevice:BubbleTaskStackListenerTest
Change-Id: I62e03136f32ba7d29f363ddd4ae895091c4753e3