[TIMOB-3412] Android: Auto width/height resource drawables should be sized as they are in native Android

Given a native android project (non-titanium) with the following:

• This layout xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" >
<ImageView 
    android:src="@drawable/test" 
    android:id="@+id/iv" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"
/>
</LinearLayout>

• A file, test.png, in res/drawable-mdpi. The file is a 50 pixel by 50 pixel graphic.

• The application running on a high-density device.

When rendered, the image view will be 75 x 75 pixels (50 * 1.5), because the graphic file was in the mdpi (medium density) drawable folder and the device is a high density device, so Android automatically scales it up.

---

Given a Titanium project with the following:

• The same test.png from above (50x50) in the project's platform/android/res/drawable-mdpi folder.

• The following app.js:

Titanium.UI.setBackgroundColor('#000');
var win = Titanium.UI.createWindow({  
    title:'Test',
    backgroundColor:'#000',
    exitOnClose: true
});

var iv = Ti.UI.createImageView({
    left: 0, top: 0, height: 'auto', width: 'auto',
    image: Ti.App.Android.R.drawable.test
});
win.add(iv);

var btn = Ti.UI.createButton({
    top: '50%', height: 'auto', width: 'auto', left: 0,
    title: 'Get dimensions'
});
btn.addEventListener('click', function(){
    var size = iv.size;
    Ti.API.info("ImageView dimensions: " + size.width + "x" + size.height);
});
win.add(btn);
win.open();

When run, and when clicking the "Get dimensions" button, the logcat output will show that the rendered width and height remain at 50x50, so the image was not scaled up automatically. I believe it should have been.

Expected outcome: The logcat output from the above Titanium project should show "ImageView dimensions: 75x75".