[TIMOB-25625] Android: ScrollableView left/right page arrows are not density scaled

*Summary:* On Android, a ScrollableView's left/right paging arrows are hard-coded to 80x80 pixels. They appear very large on a low DPI screen (such as "hdpi") and small on a high DPI screen (such as "xxxhdpi"). *Steps to Reproduce:*

Build and run the below code on an "hdpi" device.

Scroll to the right in the ScrollableView.

Note the very LARGE left/right arrows that are overlaid on the view.

Run the below code on an "xxxhdpi" device.

Scroll to the right in the ScrollableView.

Note the very small left/right arrows that are overlaid on the view.

var window = Ti.UI.createWindow();
var scrollableView = Ti.UI.createScrollableView(
{
	views:
	[
		Ti.UI.createView({ backgroundColor: "red" }),
		Ti.UI.createView({ backgroundColor: "green" }),
		Ti.UI.createView({ backgroundColor: "blue" }),
		Ti.UI.createView({ backgroundColor: "purple" }),
	],
	showPagingControl: true,
});
window.add(scrollableView);
window.open();

*Expected Result:* The left/right arrows should be density scaled so that they appear to have a similar physical size (in inches) between different DPI devices.