Disabling alpha layer on some views

Change-Id: Ide1d5951ea80080f8fea8f32a76487b646b4f958
(cherry picked from commit 2020b20cd9)

src/com/android/launcher3/FastBitmapDrawable.java

@@ -174,10 +174,6 @@ public class FastBitmapDrawable extends Drawable {
         return getBounds().height();
     }
 
-    public Bitmap getBitmap() {
-        return mBitmap;
-    }
-
     @Override
     public boolean isStateful() {
         return true;