Basic android.graphics Rect and Canvas implementation (#461)

Some extensions use more Canvas methods, but they don't
really seem to get that far yet, all the others I was
able to test seem to work now.

AndroidCompat/src/main/java/android/graphics/BitmapFactory.java

@@ -4,33 +4,48 @@ import java.awt.image.BufferedImage;
 import java.io.ByteArrayInputStream;
 import java.io.InputStream;
 import java.io.IOException;
+import java.util.Iterator;
 import javax.imageio.ImageIO;
+import javax.imageio.ImageReader;
+import javax.imageio.stream.ImageInputStream;
 
 public class BitmapFactory {
-    public static Bitmap decodeStream(InputStream is) {
-        Bitmap bm = null;
+    public static Bitmap decodeStream(InputStream inputStream) {
+        Bitmap bitmap = null;
 
         try {
-            BufferedImage bf = ImageIO.read(is);
-            bm = new Bitmap(bf);
+            ImageInputStream imageInputStream = ImageIO.createImageInputStream(inputStream);
+            Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(imageInputStream);
+
+            if (!imageReaders.hasNext()) {
+                throw new IllegalArgumentException("no reader for image");
+            }
+
+            ImageReader imageReader = imageReaders.next();
+            imageReader.setInput(imageInputStream);
+
+            BufferedImage image = imageReader.read(0, imageReader.getDefaultReadParam());
+            bitmap = new Bitmap(image);
+
+            imageReader.dispose();
         } catch (IOException ex) {
             throw new RuntimeException(ex);
         }
 
-        return bm;
+        return bitmap;
     }
 
     public static Bitmap decodeByteArray(byte[] data, int offset, int length) {
-        Bitmap bm = null;
+        Bitmap bitmap = null;
 
-        ByteArrayInputStream bais = new ByteArrayInputStream(data);
+        ByteArrayInputStream byteArrayStream = new ByteArrayInputStream(data);
         try {
-            BufferedImage bf = ImageIO.read(bais);
-            bm = new Bitmap(bf);
+            BufferedImage image = ImageIO.read(byteArrayStream);
+            bitmap = new Bitmap(image);
         } catch (IOException ex) {
             throw new RuntimeException(ex);
         }
 
-        return bm;
+        return bitmap;
     }
 }