Call AccessibilityDragListener immediately after Workspace's OnDragListener.

This ensures that the dragInfo has not been set to null before the AccessibilityDragListener's
onDragEnd is called. Previously, this was breaking long accessibility moves.

Bug: 387563703
Test: Verified locally that this fixes the issue.
Flag: EXEMPT bug fix.
Change-Id: I8d25c3865a0a025a9dad341ea39062cb3658a763