Refactor ArrowTipView so it can be customized and used in any drag layer.

Allows use in TaskbarDragLayer.

Allows customization of properties like text color, background color, and open/close animations.

Bug: 250092437
Test: manual. (Will test with TaplTestsTaskbar in follow up CL when implemented.)
Change-Id: I056395322e5fef7aa4d9fd7e4c2d73c050eff759