feat(android): backgroundColor property in imageAsResized

[m1ga]

In case you want to resize a PNG in order to save it as a JPG file. Currently it will be black when you save it. This allows you to set a custom color as a background:

	row.addEventListener('click', () => {
			const options = {
				width: 320,
				height: 320,
				backgroundColor: "red"
			};
			showImageWindowFor(ImageFactory.imageAsResized(sourceBlob, options));

(example/app.js)

ti.imagefactory-android-5.1.1.zip