[3/n] Add onDragMove API to notify tiling of drag to break tiling

This CL adds a new API, onDragMove to DragEventListener, to notify the tiling
controller of drag to break tiling and hide the divider view.

Flag: com.android.window.flags.enable_tile_resizing
Test: tests are WIP
Bug: 368892978
Change-Id: I327d18f0bb88d5629e980b43c03d3fb1aec470e7