Add a util method of creating Icon with Drawable

- Add a util method to help create Icon with Drawable so that
users don't need to handle bitmaps
- Add support for creating with ColorDrawable

Test: robotest
Fixes: 124407373
Change-Id: I1897256821cc804a5e599d967feb84a3bcd689a9

src/com/android/settings/wifi/slice/ContextualWifiSlice.java

@@ -90,7 +90,7 @@ public class ContextualWifiSlice extends WifiSlice {
         }
 
         d.setColorFilter(new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_IN));
-        return IconCompat.createWithBitmap(Utils.drawableToBitmap(d));
+        return Utils.createIconWithDrawable(d);
     }
 
     @Override