Fixing Intrinsic dimensions of FastBitmapDrawable

> This was changed initially to allow overriding icon size in case
of PreloadIconDrawable. But the implementation of PreloadIconDrawable
has changed since then and this hack is no longer required.

issue: 15545872
Change-Id: I192056179837f05c5be9e24c3e1251cf7e2a7c8c

src/com/android/launcher3/FastBitmapDrawable.java

@@ -113,12 +113,12 @@ class FastBitmapDrawable extends Drawable {
 
     @Override
     public int getIntrinsicWidth() {
-        return getBounds().width();
+        return mBitmap.getWidth();
     }
 
     @Override
     public int getIntrinsicHeight() {
-        return getBounds().height();
+        return mBitmap.getHeight();
     }
 
     @Override