[TIMOB-26315] Android: Support touch feedback on backgroundImage, backgroundGradient, and transparent backgrounds

*Summary:* A Ti.UI.View object's touchFeedback and touchFeedbackColor properties will only show a touch/tap ripple animation if you set the view's backgroundColor property to a non-transparent color. This is a documented limitation. https://docs.appcelerator.com/platform/latest/#!/api/Titanium.UI.View-property-touchFeedback https://docs.appcelerator.com/platform/latest/#!/api/Titanium.UI.View-property-touchFeedbackColor We should add touch feedback to the following as well: * backgroundImage property (only apply ripple to non-transparent part) * backgroundGradient property (only apply ripple to non-transparent part) * No background (ripple applied to entire transparent background) *Use-Case:* This is needed for developers who want to show buttons with custom image backgrounds.

var window = Ti.UI.createWindow();
var button = Ti.UI.createButton({
	title: "Tap Me",
	backgroundImage: "android.resource://android/drawable/panel_picture_frame_bg_focus_blue",
	touchFeedbackColor: "yellow",
	touchFeedback: true,
});
button.addEventListener("click", function() {
	Ti.API.info("### Button was clicked on.");
});
window.add(button);
window.open();

*Note:* The touch feedback feature only works on Android 5.0 and newer OS versions.