Clicking on a button that is animating-out is only done by
mistake. Better make them unclickable.
Also, interrupt an out-in animation if it has been preempted.
Bug: 7600384
Change-Id: Ic4700cda46a894ea580bc67ee7bef885ecf1d3bc
Handling buttons directly in the preference causes large
problems of code readability and interface. It's better to
have a class to manage the buttons and their animations
separately. This is feature-equivalent, and mostly
delegates stuff for now.
Bug: 7600384
Change-Id: Ia8da0ec68ffac84fc1d65e1760539a87a73fa776
