feat(android): Allow touch feedback for image and gradient backgrounds

[ypbnv]

JIRA: https://jira.appcelerator.org/browse/TIMOB-26315

Description:
Touch feedback property is now available for views with an image or a gradient backgrounds.

No unit tests since this is a visual improvement.

Test case:

var win = Ti.UI.createWindow({ layout: 'vertical'}),
	button = Ti.UI.createButton({ top: 10,
				backgroundImage: '<your-image-here>',
				touchFeedback: true,
				touchFeedbackColor: 'blue' }),
	button2 = Ti.UI.createButton({ top: 10,
				backgroundColor: 'yellow',
				touchFeedback: true,
				touchFeedbackColor: 'green'}),
	button3 = Ti.UI.createButton({ top: 10,
				backgroundGradient: { type: 'linear',
				startPoint: { x: '0%', y: '50%' },
				endPoint: { x: '100%', y: '50%' },
				colors: [ { color: 'red', offset: 0.0},
					{ color: 'blue', offset: 0.25 },
					{ color: 'red', offset: 1.0 } ],
				},
				touchFeedback: true,
				touchFeedbackColor: 'blue'}),
	button4 = Ti.UI.createButton({ top: 10,
				title: 'Change colors'});

win.add([button, button2, button3, button4]);

button4.addEventListener('click', function () {
	button.touchFeedbackColor = 'yellow';
	button2.touchFeedbackColor = 'red';
	button3.touchFeedbackColor = 'green';
});
win.open();

[build]

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[jquick-axway]

I think removing this block of code will cause a regression where you can no longer change a view's backgroundColor dynamically anymore because setBackgroundColor() won't get called.

[jquick-axway]

Closing in favor of PR #11795 .