[TIMOB-4859] Allow conversion of globalPoints to rotation-based values

The globalPoint coordinates returned from touch events on an element do not update once the device is rotated; when in portrait mode the X coordinate will increase as you touch from left-to-right, but if you switch to landscape mode the X coordinate becomes the Y coordinate, and vice versa. Sample code below; to reproduce, start in portrait mode and drag left to right (X coordinate increases as expected)... then flip into landscape and drag from left to right; X coordinate does not change as expected.

var win = Ti.UI.createWindow();
var view = Ti.UI.createView();
var output = Ti.UI.createLabel({
	top: 20,
	left: 20,
	width: 280,
	color: "#FFF",
	textAlign: "center",
	font: {
		fontSize: 16,
		fontWeight: "bold"
	},
	text: "Touch and drag anywhere"
});

view.addEventListener("touchmove", function(_event) {
	output.text = "X Global Point: " + _event.globalPoint.x;
});

view.add(output);
win.add(view);
win.open();

Originally reported as a bug, but was invalidated as globalPoint is attached at the device level, not window level. Changed from bug to feature request as per TIMOB-4695. Request is to allow translation from device level to window level.