Load opaque assets in RGB-565 until Bitmap.hasAlpha() works properly.

Change-Id: I1106855e9f2255c1b78fd76a3fe1c116b3c2fb87

graphics/java/android/graphics/BitmapFactory.java

@@ -69,11 +69,8 @@ public class BitmapFactory {
          * the decoder will try to pick the best matching config based on the
          * system's screen depth, and characteristics of the original image such
          * as if it has per-pixel alpha (requiring a config that also does).
-         * 
-         * The configuration is set to {@link android.graphics.Bitmap.Config#ARGB_8888}
-         * by default.
          */
-        public Bitmap.Config inPreferredConfig = Bitmap.Config.ARGB_8888;
+        public Bitmap.Config inPreferredConfig;
 
         /**
          * If dither is true, the decoder will attempt to dither the decoded