[ScriptUI] onDraw handler takes a DrawState argument

[fartinmartin]

The current definition of the onDraw callback(s) says:

Handler takes one argument, a DrawState object.

But, the type suggests otherwise:

Types-for-Adobe/shared/ScriptUI.d.ts

Line 839 in 67bcaf7

onDraw(): void

This PR adds a drawState: DrawState argument to each onDraw method signature.