Improve the property modification effiency of VectorDrawable animators

Previously, the VectorDrawable animators modify the VD properties by
doing reflection based on the property name. This CL avoids the overhead
of calling reflection by wrapping the setters of VD objects in
Float/IntProperty.

Bug: 28124049
Change-Id: I562c8d749fdfe508564c82a700a92e835cdd9ff4
(cherry picked from commit 9f3b31b9)