waitForParams feature #3
Description
Add method waitForParams() (returning void!) that can be called instead of start().
The ObjectAnimator has to be built (and started), when the View gets its LayoutParams. If LayoutParams are available at the moment of call (of the waitForParams method), the Animator should be built and started right away. If LayoutParams are not available, a proper OnAttachStateChangeListener should be added for the animated View.