Render drag move indicator

This commit renders the indicator surface for dragging windows across
multiple displays.

The surface rendering is performed by a new utility class
`MultiDisplayDragMoveIndicatorController`, which is designed to be
reusable for different window types (e.g., freeform, Bubble, PiP).

Bug: 383069173
Test: manual and atest
Flag: com.android.window.flags.enable_connected_displays_window_drag
Change-Id: I3e09794ec30ae4b2dc89c9a42c64d39c1fb9740b