Fixing implementation of View.requestRectangleOnScreen(Rect, boolean).

1. The implementation was not taking into account the transformation
   matrices if the views.

2. The rectangle that was passed as an argument to
   ViewParent.requestChildRectangleOnScreen was modified by
   some implementations - now care is taken to prevent it.

3. The scroll of child was used when a rectangle of its coordinate
   system was mapped to one in the parent system. However, the
   scroll shows how much a parent has scrolled its descendants, so
   the scroll of the parent has to be used not the child.

bug:7139556

Change-Id: I5b09eb7f105047e95282f74308968d5465831c84